200 entries under adjective topic. ×

12
cowardly(weak, nervous, shy, fearful)
12
unsure(uncertain, awkward, doubtful, hesitant)
11
nervous(weak, fear, awkward, shy)
11
reluctant(uncertain, shy, doubtful, hesitant)
10
reticent(person, feelings, secret, sneaky)
10
shamefaced(soft, shy, meek, modesty)
9
insecure(uncertain, awkward, nervous, worried)
9
shrinking(weak, nervous, shy, hesitant)
9
unobtrusive(soft, modest, shy, hesitant)
9
unpretentious(person, soft, feelings, shy)
8
apprehensive(weak, uncertain, fear, nervous)
8
doubtful(uncertain, nervous, shy, hesitant)
8
uncertain(awkward, nervous, doubtful, hesitant)
8
unconfident(uncertain, nervous, worried, hesitant)
7
introverted
7
tentative(quiet, uncertain, modest, shy)
6
anxious(weak, uncertain, awkward, shy)
6
inhibited
6
selfless
6
withdrawn(quiet, gentle, modest, aloof)
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APASmart Define. (2016). diffident thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/diffident/thesaurus/synonyms
ChicagoSmart Define. 2016. "diffident thesaurus" https://smartdefine.org/diffident/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, diffident thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/diffident/thesaurus/synonyms>.
MLASmart Define. "diffident thesaurus" 24 March 2016. Web. 21 September 2026. <https://smartdefine.org/diffident/thesaurus/synonyms>