ornithologist
A person who studies or practices ornithology.

ornithologists
plural of ornithologist

ornithomancer
A practitioner of ornithomancy.

ornithomancers
plural of ornithomancer

ornithophile
A person who loves birds; a bird-lover.

ornithophiles
plural of ornithophile

ornithophilist
A lover of birds; an ornithophile.

ornithophilists
plural of ornithophilist

ornithophobe
One who exhibits ornithophobia, the fear of birds.

ornithophobes
plural of ornithophobe

ornithoscopist
A birdwatcher.

ornithoscopists
plural of ornithoscopist

ornithotomist
Someone who is skilled in ornithotomy.

ornithotomists
plural of ornithotomist

orographer
A specialist in orography.

orographers
plural of orographer

orologist
an expert in orology.

orologists
plural of orologist

orpailleur
gold prospector, gold panner

orpailleurs
plural of orpailleur

orphaline
Obsolete form of orpheline.

orphanet
A young or little orphan.

orpheline
An orphan.

orphelines
plural of orpheline

orpheonist
A member of an orphéon.

orpheonists
plural of orpheonist

orthodontist
An orthodontic dentist.

orthodontists
plural of orthodontist

orthodoxian
Of or pertaining to Orthodox beliefs.

orthodoxians
plural of orthodoxian

orthodoxist
An advocate of a rigid orthodoxy

orthodoxists
plural of orthodoxist

orthoepist
An expert at orthoepy: a person who studies the pronunciation of words, especially (historical) one of the orthoepists, 16th- and 17th-century linguists who tried to establish standard English pronunciations and spellings.

orthoepists
plural of orthoepist

orthogeneticist
One who supports the idea of orthogenesis.

orthogeneticists
plural of orthogeneticist

orthographer
Someone who devises an orthography.
Someone who is knowledgeable in spelling rules; someone who spells words correctly.

orthographers
plural of orthographer

orthographist
One who is versed in orthography.

orthographists
plural of orthographist

orthoimagery
orthoimages in general; their production

orthonym
The real name of a person who uses a pseudonym.
The correct word for a concept in a specified language.

orthonyms
plural of orthonym

orthopaedist
Alternative spelling of orthopedist.

orthopaedists
plural of orthopaedist

orthoped
Synonym of orthopod.

orthopediatrician
A doctor who specializes in orthopedics

orthopediatricians
plural of orthopediatrician

orthopedist
A surgeon who specializes in orthopedics.

orthopedists
plural of orthopedist

orthopeds
plural of orthoped

orthophorics
plural of orthophoric

orthopnea
Alternative spelling of orthopnoea.

orthopnoea
Shortness of breath when lying flat, causing the person to have to sleep propped up in bed or sitting in a chair.

orthopnoeae
plural of orthopnoea

orthopnoeas
plural of orthopnoea

orthopny
Dated form of orthopnoea.

orthopod
An orthopaedic surgeon.

orthopods
plural of orthopod

orthopsychiatrist
A psychiatrist involved in orthopsychiatry.

orthopsychiatrists
plural of orthopsychiatrist

orthopterist
An entomologist who specialises in orthopters

orthopterologist
An entomologist who studies orthopterology.

orthopterologists
plural of orthopterologist

orthorexics
plural of orthorexic

orthosurgeon
An orthopedist or orthopedic surgeon.

orthotist
A person who makes or fits orthotic devices.

orthotists
plural of orthotist

orutu
A one-stringed African fiddle, played especially by the Luo people.

oryctologist
Someone versed in oryctology.

oryctologists
plural of oryctologist

osakate
A kimarite in which the attacker, grappling near the edge, bends backwards and swings his opponent around and out.

osculator
An algorithm for performing osculation.
A circle of osculation.
Someone who kisses.

osculators
plural of osculator

oshaku
An apprentice geisha having the role of pouring sake or other alcoholic beverages for others.

oshi
A person's favorite VTuber, idol, or character, especially one they actively support and promote.

oshidashi
a kimarite in which the attacker pushes his opponent out of the ring, maintaining hand contact at all times

oshis
plural of oshi

oshitaoshi
A kimarite in which the attacker pushed his opponent backwards and over.

oslerian
Misspelling of Oslerian.

osphresiologist
One who studies osphresiology.

osphresiologists
plural of osphresiologist

ossifer
A police officer.

ossifers
plural of ossifer

ossifier
One who, or that which, ossifies.

ossifiers
plural of ossifier

ossilegium
The collection of the bones of a dead person, after decomposition of the soft tissue, for placement in an ossuary

ostentatrix
An ostentatious woman

osteoarchaeologist
One who studies osteoarchaeology.

osteoarchaeologists
plural of osteoarchaeologist

osteoarcheologist
Alternative form of osteoarchaeologist.

osteoarcheologists
plural of osteoarcheologist

osteoarthritics
plural of osteoarthritic

osteobiographies
plural of osteobiography

osteobiography
The life story of a person as deduced from their skeletal remains

osteographer
One who studies osteography.

osteographers
plural of osteographer

osteologer
an osteologist.

osteologers
plural of osteologer

osteologist
A scientist or physician whose speciality is osteology.

osteologists
plural of osteologist

osteopath
A non-physician healthcare practitioner who practices osteopathy by manipulating the skeleton and muscles. Not to be confused with Doctors of Osteopathic Medicine (D.O.) (also known as osteopathic physicians) who are full physicians like Doctors of Medicine (M.D.).

osteopathist
An osteopath.

osteopathologist
A physician or scientist who studies osteopathology.

osteopathologists
plural of osteopathologist

osteopaths
plural of osteopath

osteotomist
Someone skilled in osteotomy

osteotomists
plural of osteotomist

ostiaries
plural of ostiary

ostiary
The mouth of a river; an estuary.
One who keeps the door, especially the door of a church; a porter.

ostlers
plural of ostler

ostomate
A person who has had an ostomy, a surgical operation to create an opening in the body for the discharge of body wastes.

ostomates
plural of ostomate

ostraciser
Alternative form of ostracizer.

ostracisers
plural of ostraciser

ostracism
In ancient Athens (and some other cities), the temporary banishment by popular vote of a citizen considered dangerous to the state.
Banishment by some general consent.
Temporary exclusion from a community or society.

ostracisms
plural of ostracism

ostracizer
One who ostracizes.

ostracizers
plural of ostracizer

ostracodologist
A scientist who studies ostracods.

ostracodologists
plural of ostracodologist

ostreaculturist
Alternative form of ostreiculturist.

ostreaculturists
plural of ostreaculturist

ostreger
Obsolete form of austringer.

ostregers
plural of ostreger

ostreiculturist
A breeder or farmer of oysters

ostreiculturists
plural of ostreiculturist

ostreophage
Synonym of ostreophagist.

ostreophagist
Someone who eats oysters.

ostreophagists
plural of ostreophagist

ostringer
Obsolete form of austringer.

ostringers
plural of ostringer

otaku
One with an obsessive interest in something, particularly (originally derogatory) an obsessive Japanese fan of anime or manga.

otakukin
A person who claims or believes that their soul is a reincarnation or parallel incarnation of a fictional character (especially, from anime, manga, or video games).

otakus
plural of otaku

othematomata
plural of othematoma

otherer
One who others.

otherers
plural of otherer

otherkin
A person who believes their soul, essence, or identity is non-human.

otherkins
plural of otherkin

otherling
One who is different from others; someone or something possessing unique qualities; an exception; dissident.

otherlings
plural of otherling

othermother
A woman who cares for a child that is not biologically her own.

othermothers
plural of othermother

otjize
A mixture of butterfat and ochre pigment, used by the Himba people of Namibia to protect themselves from the desert climate.

otkaznik
Synonym of refusenik.

otkazniki
plural of otkaznik