singular (n.)
- absolute
- absurd
- alone
- an
- any
- celibate
- characteristic
- concrete
- crank
- deviant
- dual
- eccentric
- exclusive
- express
- extraordinary
- fey
- funny
- individual
- inner
- integral
- intimate
- irregular
- lone
- minute
- notable
- number
- odd
- oddball
- off
- offbeat
- one
- out
- particular
- personal
- plural
- private
- queer
- rare
- screwball
- separate
- signal
- simple
- single
- sole
- solid
- solitary
- solo
- special
- specific
- superior
- trial
- uniform
- unique
- weird
- whole
singular (adj.)
- abnormal
- absolute
- absurd
- alone
- an
- anomalous
- any
- appropriate
- atomic
- atypical
- azygous
- bizarre
- celibate
- certain
- characteristic
- concrete
- conspicuous
- crank
- cranky
- crotchety
- curious
- defined
- definite
- detailed
- determinate
- deviant
- different
- discrete
- distinct
- distinctive
- distinguished
- divergent
- dotty
- dual
- eccentric
- either
- eminent
- erratic
- esoteric
- especial
- exceptional
- exclusive
- express
- extraordinary
- fey
- fixed
- flaky
- freakish
- freaky
- funny
- idiosyncratic
- important
- individual
- indivisible
- inner
- integral
- intimate
- intrinsic
- irreducible
- irregular
- isolated
- kinky
- kooky
- lone
- maggoty
- marked
- minute
- monistic
- notable
- noteworthy
- nutty
- odd
- off
- offbeat
- one
- only
- out
- outlandish
- outre
- outstanding
- particular
- peculiar
- personal
- plural
- precise
- private
- prominent
- proper
- quaint
- queer
- quintessential
- quirky
- rare
- remarkable
- respective
- screwball
- screwy
- separate
- several
- signal
- significant
- simple
- single
- sole
- solid
- solitary
- solo
- special
- specific
- strange
- superior
- trial
- twisted
- unanalyzable
- uncommon
- unconventional
- undivided
- unearthly
- unexampled
- uniform
- unimaginable
- unique
- unitary
- unnatural
- unpaired
- unrepeatable
- unthinkable
- unusual
- unwonted
- wacky
- weird
- whimsical
- whole