Synonyms of incommunicative

1 Syllable
curt, mum, dumb, dour, quiet, cold, mute
2 Syllables
brooding, silent, withdrawn, speechless, dried-up, sparing, distant, close, aloof
3 Syllables
tightlipped, reserved, laconic, reticent, sententious, tight-lipped
4 Syllables
unforthcoming, antisocial, close-mouthed
5 Syllables
unexpressive
6 Syllables
incommunicable, uncommunicable
7 Syllables
uncommunicative