unsystematic (adj.)
- aimless
- amorphous
- broken
- capricious
- casual
- catchy
- changeable
- changing
- choppy
- desultory
- deviating
- different
- disconnected
- discontinuous
- disjunct
- disordered
- disorderly
- dispersed
- disproportionate
- divergent
- diversified
- eccentric
- erose
- erratic
- fitful
- flickering
- fluctuating
- formless
- frivolous
- gratuitous
- halting
- haphazard
- hit-or-miss
- impulsive
- inchoate
- incoherent
- inconsistent
- inconstant
- indiscriminate
- intermittent
- irregular
- jagged
- jerky
- meaningless
- mercurial
- misshapen
- motley
- mutable
- nonconformist
- nonstandard
- nonuniform
- patchy
- planless
- pluralistic
- promiscuous
- ragged
- rambling
- random
- rough
- scrappy
- senseless
- shapeless
- spasmodic
- spastic
- sporadic
- spotty
- staggering
- straggling
- straggly
- uncertain
- unclassified
- undirected
- unequal
- uneven
- ungraded
- unmethodical
- unordered
- unorganized
- unorthodox
- unrhythmical
- unsettled
- unsorted
- unstable
- unsteady
- unsymmetrical
- vague
- variable
- variegated
- variform
- various
- varying
- wandering
- wavering
- wobbling
- wobbly
