Synonyms of complex in English:

complex


See definition of complex

adjective

1‘a complex situation’

SYNONYMS
complicated, involved, intricate, convoluted, tangled, elaborate, serpentine, labyrinthine, tortuous, impenetrable, Byzantine, Daedalian, Gordian
difficult, hard, knotty, tricky, thorny, problematical
informal fiddly
rare involute, involuted
ANTONYMS

simple, straightforward

2‘a complex structure’

SYNONYMS
compound, composite, compounded, multiplex

noun

1‘a complex of mountain roads’

SYNONYMS
network, system, interconnected scheme, interconnected structure, interconnected system, nexus, web, tissue
combination, composite, synthesis, fusion, aggregation

2‘there's no point having a complex about losing your hair’

SYNONYMS
obsession, phobia, fixation, preoccupation
neurosis
idée fixe
informal hang-up, thing, bee in one's bonnet