fay
To fit, to add.
To join (pieces of timber) tightly. The long edges of the staves of a barrel have to be fayed so that when it is assembled it will not leak.
Of pieces of timber: to lie close together.
To fadge.

fayalitic
Of, pertaining to, resembling or containing fayalite

fcc
Initialism of face-centered cubic.

fearable
Capable or worthy of being feared.

fearfuler
comparative form of fearful: more fearful

fearfulest
superlative form of fearful: most fearful

fearfuller
comparative form of fearful: more fearful

fearfullest
superlative form of fearful: most fearful

fearless
Without fear.

fearlike
Resembling or characteristic of fear.

feasable
Misspelling of feasible.

feasible
Able to be done in practice.

feastless
Without a feast.

feastlike
Resembling or characteristic of a feast.

feastly
Of, relating to, or characteristic of a feast; festive.

feasty
Characteristic of a feast.

featherable
Of a propeller: capable of having its blades streamlined by rotating them perpendicular to the axis of the propeller when the engine is shut down, so that the propeller does not windmill as the aircraft flies.

featherbrained
Alternative spelling of feather-brained.

featherheaded
Alternative form of feather-headed.

featherier
comparative form of feathery: more feathery

featheriest
superlative form of feathery: most feathery

featherleaf
Applied to various plants characterized by feathery leaves.

featherless
Having no feathers.

featherlight
Alternative form of feather-light.

featherlike
Having the characteristics of plumage.
As light as a feather.

featherly
Like a feather, or feather; feathery.

feathern
plural of feather

featherpated
foolish; giddy-headed

feathersome
Characterised or marked by feathers

feathery
Resembling feathers.
Covered with feathers.

featless
without a feat

featuous
Alternative form of featous.

featural
Of or pertaining to features.
Being or relating to a writing system whose symbols encode phonological features of the sounds that they correspond to.

featureful
Having many features.

featureless
Without distinguishing features.

featuresome
Rich in features.

featurish
Resembling or characteristic of a journalistic feature.

febrifugal
Acting against or preventing fever.

febrigenic
That causes, or is associated with fever

febrile
Feverish, or having a high temperature.
Involving fever as a symptom or cause.
Full of nervous energy.

fecal
Of or relating to feces.

fecalia
Synonym of fecal matter.

fecaloid
Resembling excrement or faeces.

fecial
Alternative spelling of fetial.

fecials
plural of fecial

feckful
Powerful, effective, efficient, vigorous.

feculent
Dirty with faeces or other impurities

fecundative
That fecundates.

fecundatory
Of or relating to fecundation.

fecundist
Of or pertaining to fecundism.

federalistic
Relating to or characteristic of federalism.

federalizable
Capable of being federalized.

federate
Federated, united in an alliance or federation.

federated
simple past and past participle of federate

federation
Act of joining together into a single political entity.
Array of nations or states that are unified under one central authority which is elected by its members.
Any society or organisation formed from separate groups or bodies.
A collection of network or telecommunication providers that offer interoperability.

federational
Federative; pertaining to, characteristic of, or constituting a federation.

federationalist
One who supports federationalism.

federations
plural of federation

federative
Uniting in a league; forming a confederacy, a federation; federal.

fedoraed
Wearing a fedora.

feeable
For which a fee may be charged.

feeble
Deficient in physical strength.
Lacking force, vigor, or effectiveness in action or expression; faint.

feebleminded
Alternative spelling of feeble-minded.

feebler
comparative form of feeble: more feeble

feeblesome
Characterised or marked by feebleness; weak or faint

feeblest
superlative form of feeble: most feeble

feeblish
Somewhat feeble.

feedable
Capable of being fed (given food).
Capable of being fed (given as food).
Able to be fed into a machine.

feedbacky
Characterized by the kind of sound distortion called feedback.

feelable
Capable of being felt.

feelered
Having a specified kind of feeler.

feeless
Without a fee.

feelingful
Full of feeling or emotion.

feelingless
Without feeling, without emotion, unemotional.

feelsome
Characterised or marked by feeling; pleasurable to the touch; nice to feel

feepaying
Required to pay a fee for a service
Charging fees for providing education or services; not free

feerie
Alternative spelling of féerie.
Archaic spelling of fairy.

feeries
plural of feerie

feeted
Having feet.

feetfirst
With one's feet going first.

feetless
Without feet.

feetlong
Measuring many feet in length.

feetsie
Alternative form of feetsy.

feetsy
Having a section that covers the feet.

feignable
Able to be feigned.

feigned
Being a pretense, simulation, or counterfeit, or something false or fraudulent.

feignful
False; feigned.

feintest
superlative form of feint: most feint

feirie
healthy; strong

feldsparlike
Resembling or characteristic of feldspar.

feldsparphyric
Relating to or resembling a feldsparphyre.

feldspathic
Containing feldspar.

feldspathoidal
Having feldspathoids.

feldspatholithic
Containing rocks and feldspar.

feldspatholithoquartzose
Synonym of quartzofeldspatholithic.

feldspathose
Containing feldspar.

felibrean
Relating to the félibres.

felicidal
Pertaining to felicide.
Inclined to kill cats.

felicific
Of, pertaining to, or producing pleasure or happiness.

felicitous
Characterized by felicity.
Characterized by felicity.
Characterized by felicity.
Of a sentence or utterance: semantically and pragmatically coherent; fitting in the context.

felinological
Pertaining to felinology.

fellable
Able, or fit, to be felled.

fellatory
Pertaining to fellatio.

fellic
Alternative form of fellinic.

fellifluous
Flowing with bile or gall.

fellinic
Only used in fellinic acid

fellowless
Without fellow or equal; peerless.
Without a fellow (e.g. university employee)

fellowlike
Like a comrade; companionable; on equal terms.

fellowly
Fellowlike; companionable, sociable or sympathetic.

feloid
Relating to the Feloidea; feliform.

felonious
Of, relating to, being, or having the quality of felony.
Done with intent to commit a crime.

felsic
Enriched in minerals predominantly composed of the lighter elements such as silicon, oxygen, aluminium, sodium, and potassium.

felsics
plural of felsic

felsitic
Relating to, or containing, felsite.

felsophyric
Relating to felsophyres.

felspathic
Alternative form of feldspathic.

felspathoid
Alternative form of feldspathoid.

felspathoidal
Alternative form of feldspathoidal.

felspathoids
plural of felspathoid

felties
plural of felty

feltless
Without felt.

feltlike
Resembling felt (the fabric).

felty
Of, pertaining to, or similar to felt.

fem
Synonym of femme.
A feminine or effeminate person.

femalecentric
Alternative spelling of female-centric

femaleless
Devoid of females.

femalelike
Resembling or characteristic of a female.

femaler
comparative form of female: more female

femalest
superlative form of female: most female

femalish
Somewhat female or feminine.

femboyish
Displaying behavior associated with a femboy.

fembrained
Being a transgender person who acts and thinks how a woman (usually stereotypically) should (whether the speaker approves or disapproves).

femcare
feminine hygiene

femenine
Misspelling of feminine.

femic
Containing essential iron and magnesium (of rocks or minerals).

femicentric
woman-centric; focusing on women or pertaining to a focus on women (sometimes used pejoratively to imply such focus is misandric)

femicidal
Killing women.

feminacentric
Alternative spelling of feminocentric.

feminal
Of or pertaining to women, femininity or feminism

feminalist
Pertaining to or indicative of feminalism; reflecting women's values and concerns.