ostentatiously
In an ostentatious manner; extravagantly or flamboyantly.

ostentatively
Synonym of ostentatiously.

osteoarchaeologically
In an osteoarchaeological manner

osteogenically
By osteogenesis.

osteohistologically
Concerning only the osteohistological aspects.

osteologically
Concerning only the osteological aspects.

osteometrically
In an osteometric manner

osteopathically
By means of osteopathy.

ostially
Within an orifice or ostium

otherhow
By other means.

othertimes
Alternative form of other times.

otherwards
Towards an other or another direction.

otherways
Otherwise; by another means; in other respects
Otherwise; in different circumstances.
In a similar or comparable way; similarly.

otherweise
Misspelling of otherwise.

otherwhen
Other time (sometime else).

otherwhence
By other means; From otherwhere.

otherwhens
plural of otherwhen

otherwhere
Synonym of somewhere else: elsewhere, in or to some other place.

otherwhereas
Elsewhere.

otherwheres
Alternative form of otherwhere.

otherwhile
At other times; on other occasions.

otherwhiles
At another time, or other times.
sometimes; occasionally.

otherwhither
Elsewhither.

otherwised
Misconstruction of otherwise.

otiosely
In an otiose manner.

otoacoustically
In an otoacoustic manner.

otologically
In an otological manner.
With regard to otology.

otomicroscopically
In an otomicroscopic manner

otoneurologically
In terms of otoneurology.

otorhinolaryngologically
In terms of, or by means of, otorhinolaryngology.

otoscopically
By means of otoscopy or an otoscope

ototoxically
In an ototoxic manner

ottava
One octave higher; as a marking, typically abbreviated 8va.

ottavarima
Alternative form of ottava rima.

ottavarime
plural of ottavarima

ottavas
plural of ottava

otterly
Alternative form of utterly, used in situations involving otters.

oup
Pronunciation spelling of up.

ouph
Alternative form of awf (“elf”).

ouphs
plural of ouph

outby
Alternative form of outbye.

outbye
In the direction away from the coal face.
A short distance away.
Outside.

outdatedly
In an outdated manner.

outdoors
Not inside a house or under covered structure; unprotected; in the open air.

outgoingly
In an outgoing manner.

outlandishly
In an outlandish manner.

outly
Outwardly.

outmodedly
In an outmoded manner.

outragedly
In an outraged way.

outrageously
In an outrageous manner; to an outrageous degree.

outrightly
Outright.

outspokenly
In an outspoken manner.

outspreadingly
In a way that outspreads.

outstandingly
In an outstanding manner.

outwardly
Externally or on the outside, or on the surface.
Toward the outside

outwards
From the interior toward the exterior; in an outward direction.
Outwardly; (merely) on the surface.

outwith
Outside; beyond; outside of.

ovally
In an oval shape.

ovately
In an ovate manner.

overabundantly
In an overabundant manner.

overaggressively
In an overaggressive way; involving too much aggression.

overally
Misconstruction of overall.

overambitiously
With too much ambition.

overanalytically
In an overanalytical way.

overanxiously
With excessive anxiety.

overarchingly
In an overarching manner; predominantly.

overassertively
In an overassertive manner.

overattentively
Too attentively.

overawingly
So as to overawe.

overbearingly
In an overbearing manner.

overbitterly
in an overbitter manner

overboisterously
In an overboisterous manner.

overboldly
In an excessively bold manner.

overbravely
With excessive bravery.

overbrightly
Too brightly.

overbrilliantly
Too brilliantly.

overbrimmingly
In great or excessive abundance.

overbroadly
Too broadly.

overburdeningly
So as to overburden.

overbusily
in an overbusy manner

overby
A little way over.

overcarelessly
In an overcareless manner.

overcasually
In an overcasual manner.

overcharitably
In an overcharitable manner.

overcheaply
Excessively cheaply.

overclosely
Too closely.

overcomingly
So as to overcome.

overcompensatingly
In a way that overcompensates.

overcomplacently
Too complacently.

overcomplicatedly
In an overcomplicated way.

overconfidently
In an overconfident manner

overconsciously
In an overconscious manner.

overconservatively
In an overconservative manner.

overcopiously
Too copiously.

overcredulously
In an overcredulous manner.

overcritically
In an overcritical manner.

overcrowdedly
In an overcrowded manner.

overcunningly
Too cunningly.

overcuriously
With too much curiosity; in an overcurious manner.

overdaintily
Too daintily.

overdaringly
In an overdaring manner.

overdearly
At too high a price.

overdeeply
Excessively deeply.

overdelicately
In an overdelicate manner.

overdogmatically
Too dogmatically.

overdominantly
In an overdominant manner.

overdramatically
In an overdramatic manner.

overeagerly
In an overeager manner.

overearnestly
In an overearnest manner.

overeasily
In an overeasy manner; too easily.

overeffusively
In an overeffusive manner.

overelaborately
In an overelaborate manner.

overelegantly
Too elegantly.

overemotionally
In an overemotional manner.

overemphatically
In an overemphatic manner.

overenthusiastically
With excessive enthusiasm.

overexcitably
In an overexcitable manner.

overexpectantly
With excessively high expectations.

overexquisitely
In an overexquisite manner.

overextravagantly
In an overextravagant manner

overexuberantly
In an overexuberant manner.

overfaithfully
In an overfaithful manner.

overfamiliarly
In an overfamiliar way

overfinely
Too finely.

overflowingly
So as to overflow; very excessively or generously.

overfondly
With excessive fondness.

overforcefully
With excessive force.

overfreely
Too freely.

overfrequently
Too often.

overfully
Too fully.

overgenerally
In an overgeneral manner.

overgenerously
In an overgenerous way.

overgratefully
Too gratefully.

overgreatly
Too greatly.

overgreedily
With excessive greed.

overguilty
Excessively guilty.

overhardly
In an overhard way; by means which are too difficult.

overharshly
In an excessively harsh manner.

overheartily
In an excessively hearty manner.

overheatedly
In an overheated manner; with undue heat.

overheavily
Too heavily.

overhighly
Too highly; too greatly.

overhonestly
With excessive honesty.

overhurriedly
Too hurriedly.

overidealistically
In an overidealistic manner.

overinclusively
In an overinclusive manner.

overinsistently
Too insistently.

overintensely
Too intensely.

overintimately
Too intimately.

overjealously
With excessive jealousy.

overjoyfully
Too joyfully.

overlappingly
So as to overlap.

overlargely
Excessively largely.

overlavishly
In a way that is overlavish.

overleaf
On the other side of a sheet of paper (including a leaf of a book); thus, on the next page when flipping from a recto to the sequential verso.

overlearnedly
Too learnedly.

overliberally
In an overliberal manner.

overlightly
In an overlight manner; too easily or readily; frivolously

overliterally
In an overliteral way.

overlogically
Excessively logically.

overlyingly
Positioned so as to overlie something.

overmasteringly
In an overmastering manner.

overminutely
Excessively minutely; in too much fine detail.

overmodestly
With excessive modesty.

overmore
beyond
moreover; furthermore

overnarrowly
Too narrowly.

overnervously
Too nervously.

overnicely
In an overnice manner.

overoptimistically
In an overoptimistic manner.

overpage
Over the page; on the next page of the document.

overparticularly
In an overparticular manner.

overpassionately
In an overpassionate manner.

overpedantically
Too pedantically.

overpoweredly
In an overpowering manner.

overpowerfully
In an overpowerful manner.

overpoweringly
In an overpowering manner.

overprominently
Excessively prominently.

overpromptly
Too promptly.

overproportionally
In an overproportional manner

overproportionately
In an overproportionate manner.

overprotectively
In an overprotective way.

overrashly
With excessive rashness.

overratedly
In an overrated manner.