Synonyms of uncommunicativeness

2 Syllables
coyness, restraint, shyness, quietness, control, coldness, caution, constraint, calmness
3 Syllables
soundlessness, silence, aloofness, modesty, muteness, speechlessness, repression, self-control, self-restraint, laconism, suppression, backwardness
4 Syllables
inhibition, demureness, noiselessness, reluctance, formality, diffidence, reservation, reticence
5 Syllables
saturninity, secretiveness, taciturnity
6 Syllables
unresponsiveness
7 Syllables
inarticulateness