casual (adj.)
- accessory
- accidental
- additional
- adscititious
- adventitious
- affable
- aimless
- airy
- aleatory
- aloof
- amorphous
- apathetic
- appurtenant
- ataractic
- automatic
- auxiliary
- bankrupt
- blanket
- blase
- breezy
- capricious
- careless
- causeless
- chance
- chancy
- circumstantial
- clear
- collateral
- common
- conditional
- contingent
- cool
- cordial
- cursory
- cushy
- degage
- desultory
- detached
- devil-may-care
- dicey
- discontinuous
- disinterested
- disjunct
- disordered
- dispassionate
- dispersed
- disproportionate
- down-and-out
- easy
- easygoing
- effortless
- erratic
- extemporaneous
- extempore
- extra
- facile
- familiar
- fatal
- fitful
- flippant
- fluky
- folksy
- forgetful
- formless
- fortuitous
- frivolous
- general
- glib
- gracious
- gratuitous
- hand
- haphazard
- happy-go-lucky
- heedless
- hit-or-miss
- homely
- homey
- iffy
- ill-advised
- ill-considered
- impromptu
- improvised
- imprudent
- impulsive
- inadvertent
- inattentive
- inchoate
- incidental
- incoherent
- inconsiderable
- inconsiderate
- incurious
- indeterminate
- indifferent
- indigent
- indiscreet
- indiscriminate
- inessential
- inexplicable
- informal
- insensitive
- insignificant
- insouciant
- involuntary
- irregular
- lackadaisical
- lazy
- light
- listless
- loose
- low-pressure
- meaningless
- menial
- migrant
- mindless
- minor
- misshapen
- natural
- negligent
- nonchalant
- nonessential
- nonjudgmental
- nonuniform
- oblivious
- occasional
- odd
- off
- offhand
- offhanded
- out-of-the-way
- painless
- parenthetical
- part-time
- partisan
- perfunctory
- petty
- plain
- planless
- proletarian
- promiscuous
- provisional
- purposeless
- random
- reckless
- reflex
- reflexive
- regardless
- relaxed
- remote
- risky
- secondary
- senseless
- serendipitous
- servant
- shapeless
- side
- simple
- smooth
- sociable
- soft
- spare
- spasmodic
- spontaneous
- sporadic
- sporty
- stiff
- stochastic
- straggling
- straggly
- straightforward
- stray
- subsidiary
- superfluous
- supplemental
- supplementary
- tactless
- temporary
- thoughtless
- trained
- trivial
- unaccountable
- unadvised
- unaffected
- unassuming
- uncaused
- unceremonious
- uncertain
- unclassified
- uncomplicated
- unconcerned
- unconscious
- unconsidered
- unconstrained
- unconventional
- uncritical
- undemanding
- underground
- undesigned
- undetermined
- undiplomatic
- undirected
- undiscriminating
- unessential
- unexacting
- unexpected
- unfastidious
- unforeseeable
- unforeseen
- ungraded
- unheeding
- unimportant
- unintended
- unintentional
- uninterested
- unlooked-for
- unmethodical
- unmindful
- unmotivated
- unofficial
- unordered
- unorganized
- unplanned
- unpredictable
- unpremeditated
- unprepared
- unready
- unselective
- unsorted
- unstudied
- unsubtle
- unsure
- unsymmetrical
- unsystematic
- untactful
- unthinking
- unwilled
- vague
- wandering
- wholesale
- withdrawn
