complex (n.)
- acculturation
- civilization
- composite
- compound
- compulsion
- conglomerate
- cramp
- culture
- daedal
- eclectic
- embodiment
- entirety
- ethos
- fascination
- fixation
- half-and-half
- hang-up
- hard
- integer
- integration
- integrity
- jungle
- knot
- labyrinth
- maze
- mean
- meander
- medley
- mesh
- mess
- monomania
- mores
- motley
- obsession
- oneness
- possession
- preoccupation
- prepossession
- ravel
- rough
- roundabout
- snafu
- snarl
- society
- steep
- tangle
- tic
- totality
- tough
- trait
- unity
- uphill
- vague
- whole
- wilderness
complex (adj.)
- abstruse
- amalgamated
- ambiguous
- ambivalent
- amphibious
- arduous
- baffling
- blended
- brutal
- combined
- complicated
- composite
- compound
- compounded
- confounded
- confounding
- confused
- confusing
- conglomerate
- convoluted
- crabbed
- critical
- daedal
- dappled
- delicate
- demanding
- devious
- difficult
- disturbing
- eclectic
- elaborate
- entangled
- equivocal
- exacting
- fifty-fifty
- formidable
- garbled
- gordian
- hairy
- half-and-half
- hard
- hard-fought
- heterogeneous
- implicated
- indiscriminate
- intricate
- involute
- involved
- ironic
- jumbled
- knotted
- knotty
- laborious
- labyrinthian
- labyrinthine
- many-sided
- matted
- mazy
- mean
- meandering
- mingled
- miscellaneous
- mixed
- mixed-up
- motley
- multifaceted
- multifarious
- multinational
- multiracial
- mysterious
- mystifying
- obscure
- operose
- patchy
- perplexed
- perplexing
- pluralistic
- promiscuous
- puzzling
- reticular
- rigorous
- rough
- roundabout
- rugged
- scrambled
- severe
- snafu
- snarled
- sophisticated
- spiny
- steep
- strenuous
- subtle
- syncretic
- tangled
- thorny
- tic
- ticklish
- toilsome
- tough
- trait
- tricky
- twisted
- uphill
- vague
- varied
- whole
- wicked
