5
timid
4
inexpressive
4
mum
3
blank
3
close
3
closelipped
3
closemouthed
3
impassive
3
incommunicado
3
poker-faced
3
secretive
3
silent
3
social isolation
3
tightlipped
3
unexpressive
3
unpronounceable
3
vacuous
2
black
2
deadpan
2
expressionless
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APASmart Define. (2016). uncommunicative thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/uncommunicative/thesaurus/related
ChicagoSmart Define. 2016. "uncommunicative thesaurus" https://smartdefine.org/uncommunicative/thesaurus/related (accessed September 25, 2026).
HarvardSmart Define 2016, uncommunicative thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/uncommunicative/thesaurus/related>.
MLASmart Define. "uncommunicative thesaurus" 24 March 2016. Web. 25 September 2026. <https://smartdefine.org/uncommunicative/thesaurus/related>