Synonyms of tight-lipped

1 Syllable
whist, mum, dumb, quiet, hushed, mute
2 Syllables
quieter, quieted, speechless, dried-up, mumer, quieting, zipped, quietest, whister, muted
3 Syllables
tightlipped, reserved, severest, severer, reticent, taciturn, unspeaking, tongue-tied, restrained
4 Syllables
secretive, unforthcoming, iron-handed, closemouthed, closelipped
5 Syllables
inobtrusive, unexpressive
7 Syllables
uncommunicative, incommunicative