4
close(verb, adjective, quiet, soft, low)
4
reserved(adjective, close, quiet, soft, low)
4
reticent(adjective, close, quiet, soft, low)
4
tight-lipped(adjective, close, quiet, soft, low)
3
cagey(adjective, secret, sneaky, stealthy)
3
furtive(adjective, secret, sneaky, stealthy)
3
not talkative(expression, adjective, close, quiet, still)
3
secretive(adjective, close, quiet, soft, low)
2
clammed up(verb, expression, adjective, close, quiet)
2
guarded(adjective, secure, short, careful, distant)
2
hushed(adjective, close, quiet, smooth, soft)
2
introspective
2
noiseless(adjective, close, quiet, smooth, soft)
2
silent(adjective, close, quiet, smooth, soft)
2
taciturn(adjective, close, quiet, soft, low)
2
uncommunicative(adjective, close, quiet, soft, low)
2
unspeaking(adjective, close, quiet, soft, low)
2
zipped(careful, shy, reticent, ambiguous, taciturn)
1
all in(adjective, complete, finished, completed)
1
all over(adjective, complete, finished, completed)
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APASmart Define. (2013). buttoned up thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/buttoned_up/thesaurus/synonyms
ChicagoSmart Define. 2013. "buttoned up thesaurus" https://smartdefine.org/buttoned_up/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2013, buttoned up thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/buttoned_up/thesaurus/synonyms>.
MLASmart Define. "buttoned up thesaurus" 19 May 2013. Web. 20 September 2026. <https://smartdefine.org/buttoned_up/thesaurus/synonyms>