nitroglycerin vs. nitroglycerine
nitroglycerin vs. trinitroglycerin
neurolysin vs. neurotoxin
nitramine vs. tetryl
noon vs. noonday
noon vs. noontide
neaten vs. tidy
naturalize vs. tame
naturalise vs. tame
normalize vs. temper
normalize vs. renormalize
normalize vs. renormalise
normalise vs. temper
normalise vs. renormalize
normalise vs. renormalise
neutralize vs. nullify
negate vs. neutralize
neutralize vs. waste
neutralise vs. nullify
negate vs. neutralise
neutralise vs. waste
nullify vs. void
nitrify vs. nitrogenize
nitrify vs. nitrogenise
nobble vs. snatch
nobble vs. pinch
nobble vs. scam
niggle vs. quibble
negociate vs. negotiate
nominate vs. propose
narrate vs. recount
natter vs. visit
nauseate vs. revolt
nauseate vs. sicken
navigate vs. voyage
navigate vs. pilot
OK vs. ok
ok vs. okey
ok vs. sanction
OK vs. okeh
okeh vs. okey
okeh vs. sanction
OK vs. okay
okay vs. okey
okay vs. sanction
only vs. sole
outright vs. unlimited
obviously vs. patently
obviously vs. plain
obviously vs. plainly
oddly vs. peculiarly
oddly vs. queerly
oddly vs. strangely
opposite vs. paired
opposite vs. polar
opposite vs. opposition
opposite vs. reverse
outstandingly vs. remarkably
outdoors vs. outside
outside vs. remote
outdoor vs. outside
open vs. outdoors
offshore vs. seaward
onshore vs. seaward
onshore vs. shoreward
originally vs. primitively
oversea vs. overseas
o'er vs. over
off vs. sour
off vs. turned
obdurately vs. stubbornly
obstinately vs. stubbornly
overpoweringly vs. overwhelmingly
out vs. prehistoric
out vs. stunned
out vs. prohibited
out vs. proscribed
out vs. taboo
out vs. tabu
overhead vs. smash
outward vs. outwards
outbound vs. outward
offstage vs. wing
obliquely vs. sidelong
obliquely vs. sideways
offhand vs. offhanded
offhand vs. offhandedly
offhanded vs. offhandedly
objectionably vs. offensively
obnoxiously vs. offensively
obtusely vs. stupidly
obediently vs. yieldingly
observably vs. perceptibly
obsequiously vs. subserviently
obsequiously vs. servilely
observantly vs. observingly
offside vs. offsides
opulently vs. sumptuously
ostentatiously vs. showily
overabundance vs. overmuch
overmuch vs. overmuchness
overmuch vs. superabundance
overabundant vs. plethoric
overabundant vs. rife
objectionable vs. obnoxious
object vs. objective
open vs. unfastened
open vs. opened
open vs. overt
open vs. receptive
open vs. unrestricted
open vs. unexclusive
open vs. undecided
open vs. undetermined
open vs. unresolved
open vs. subject
open vs. undefendable
open vs. undefended
open vs. surface
offer vs. open
open vs. spread
open vs. unfold
oral vs. unwritten
offish vs. standoffish
old vs. previous
old vs. older
old vs. onetime
old vs. quondam
old vs. sometime
observant vs. observing
oblivious vs. unmindful
ominous vs. sinister
ominous vs. threatening
obtainable vs. procurable
optimal vs. optimum
overreaching vs. vaulting
occupied vs. tenanted
opinionated vs. opinionative
otiose vs. unavailing
otiose vs. senseless
otiose vs. wasted
otiose vs. superfluous
otiose vs. pointless
otiose vs. purposeless
overconfident vs. positive
ownerless vs. unowned
orange vs. orangish
ocher vs. ochre
orange vs. orangeness
obscene vs. salacious
obscene vs. raunchy
obscene vs. repulsive
oily vs. oleaginous
oily vs. smarmy
oily vs. soapy
oily vs. unctuous
obscure vs. vague
obscure vs. opaque
obscure vs. unintelligible
obscure vs. unnoticeable
obscure vs. unsung
obscure vs. overcloud
obfuscate vs. obscure
obnubilate vs. obscure
obtuse vs. slow
obtuse vs. purblind
overcast vs. overcasting
odd vs. uneven
odd vs. remaining
odd vs. unexpended
odd vs. peculiar
odd vs. singular
odd vs. rum
odd vs. rummy
odd vs. unmatched
odd vs. unmated
odd vs. unpaired
outspoken vs. vocal
obsessed vs. possessed
ordained vs. prescribed
outstanding vs. prominent
outstanding vs. undischarged
outstanding vs. owing
occasional vs. periodic
offbeat vs. upbeat
overdone vs. overstated
occurrence vs. occurrent
originative vs. seminal
outdated vs. superannuated
overhand vs. oversewn
overhand vs. overhanded
overarm vs. overhand
original vs. pilot
overbearing vs. swaggering
oppressive vs. tyrannical
overriding vs. paramount
overriding vs. predominant
overriding vs. predominate