irregular (n.)
- aberrant
- base
- bent
- bootleg
- bushwhacker
- common
- contraband
- cordial
- crank
- crazy
- criminal
- deviant
- disorderly
- divaricate
- easy
- eccentric
- erose
- extraordinary
- familiar
- fey
- funny
- guerrilla
- homespun
- homey
- illegitimate
- inferior
- jerky
- linsey-woolsey
- maquis
- maquisard
- mean
- moody
- motley
- natural
- nonconformist
- odd
- oddball
- offbeat
- outlaw
- partisan
- patriot
- plain
- poor
- punk
- queer
- rambling
- rank
- resistance
- rough
- roving
- schlock
- screwball
- second
- shifting
- shuffling
- simple
- singular
- sociable
- spasmodic
- spastic
- sprung
- stray
- subnormal
- third
- underground
- unique
- vagrant
- vague
- variable
- veering
- volatile
- wandering
- wanton
- wavering
- weird
- wobbly
irregular (adj.)
- aberrant
- abnormal
- actionable
- adrift
- affable
- afloat
- aimless
- alternating
- amorphous
- anarchic
- anarchistic
- anomalous
- anomic
- askew
- asymmetric
- asymmetrical
- atypical
- base
- bent
- bizarre
- black-market
- bootleg
- bowed
- broken
- bumpy
- capricious
- casual
- catchy
- changeable
- changeful
- changing
- chargeable
- cheap
- cheesy
- choppy
- coarse
- coarse-grained
- cockeyed
- common
- contorted
- contraband
- cordial
- corrugated
- craggy
- crank
- cranky
- crazy
- criminal
- crooked
- cross-grained
- crotchety
- crumpled
- degage
- desultory
- deviant
- deviating
- different
- disconnected
- discontinued
- discontinuous
- discrete
- disjunct
- disjunctive
- disordered
- disorderly
- disparate
- dispersed
- disproportional
- disproportionate
- distorted
- divergent
- diversified
- dizzy
- dotty
- easy
- easygoing
- eccentric
- episodic
- erose
- erratic
- exceptional
- extraordinary
- familiar
- felonious
- fey
- fickle
- fitful
- flaky
- flawed
- flickering
- flighty
- fluctuating
- folksy
- formless
- freakish
- freaky
- frivolous
- funny
- giddy
- gracious
- grainy
- granulated
- gratuitous
- halting
- haphazard
- hit-or-miss
- homely
- homespun
- homey
- idiosyncratic
- ill-sorted
- illegal
- illegitimate
- illicit
- impermissible
- impetuous
- impulsive
- inadequate
- inchoate
- incoherent
- inconsistent
- inconstant
- indecisive
- indiscriminate
- inferior
- infirm
- informal
- insufficient
- intermittent
- interrupted
- irresolute
- irresponsible
- jagged
- jerky
- jolty
- kinky
- kooky
- labyrinthine
- lawless
- loose
- lopsided
- low-class
- low-grade
- lumpy
- maggoty
- mazy
- mean
- meaningless
- mercurial
- mismatched
- misshapen
- moody
- motley
- mutable
- natural
- nonconforming
- nonconformist
- noncontinuous
- nonlegal
- nonlinear
- nonstandard
- nonuniform
- nutty
- occasional
- odd
- off-key
- offbeat
- offhand
- offhanded
- one-sided
- outlaw
- outlawed
- paltry
- parenthetic
- partisan
- patchy
- peculiar
- pimply
- pitted
- plain
- planless
- pluralistic
- poor
- potholed
- promiscuous
- punishable
- punk
- purposeless
- queer
- quirky
- ragged
- rambling
- random
- rank
- relaxed
- restless
- rough
- roving
- ruffled
- rutted
- rutty
- scatterbrained
- scrappy
- screwball
- screwy
- second
- second-best
- second-class
- seedy
- senseless
- shabby
- shagged
- shaggy
- shapeless
- shifting
- shifty
- simple
- singular
- skew
- skewed
- sociable
- spasmodic
- spastic
- spineless
- sporadic
- spotty
- sprung
- staggering
- straggling
- straggly
- strange
- stray
- straying
- subnormal
- suspended
- tacky
- textured
- third
- third-rate
- tinny
- tortuous
- twisted
- unaccountable
- unaffected
- unassuming
- unauthorized
- unbalanced
- unceremonious
- uncertain
- unclassified
- uncommon
- unconnected
- unconsidered
- unconstitutional
- unconstrained
- uncontrolled
- unconventional
- undependable
- under-the-counter
- under-the-table
- underground
- undirected
- undisciplined
- unequal
- uneven
- unfixed
- ungraded
- unique
- unkempt
- unlawful
- unmethodical
- unnatural
- unofficial
- unordered
- unorganized
- unorthodox
- unpolished
- unpredictable
- unrefined
- unreliable
- unrestrained
- unrhythmical
- unsettled
- unsmooth
- unsorted
- unstable
- unsteady
- unstudied
- unsymmetric
- unsymmetrical
- unsystematic
- unusual
- unwarrantable
- unwarranted
- vacillating
- vagrant
- vague
- variable
- variegated
- variform
- various
- varying
- volatile
- wacky
- wandering
- wanton
- warped
- wavering
- wavy
- wayward
- weird
- whimsical
- wishy-washy
- wobbling
- wobbly
- wrongful
