5
demure(adjective, good, quiet, gentle, reserved)
5
elegant(adjective, good, proper, polite, noble)
5
formalistic(adjective, proper, strict, established, scrupulous)
5
fussy(adjective, correct, careful, tidy, scrupulous)
5
grandiloquent(adjective, important, stiff, affected, prominent)
5
grave
5
pedantic(adjective, precise, bookish)
5
perfunctory
5
priggish(adjective, strong, correct, cold, careful)
5
pro forma(adjective, established, orderly)
5
prudish(adjective, affectation)
5
reticent(adjective, close, quiet, gentle, mild)
5
serious
5
staid(adjective, good, set, restrained, sober)
5
standoffish(adjective, close, quiet, strong, cold)
5
state(noun, adjective, traditional, ritual)
5
unbending(adjective, correct, cold, detached, unfriendly)
5
unfriendly(adjective, cool, cold, indifferent, detached)
5
withdrawn(adjective, close, quiet, gentle, mild)
4
academic(adjective, established, orderly)
10 years ago|20k views|share |citing 
APASmart Define. (2016). formal thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/formal/thesaurus/synonyms
ChicagoSmart Define. 2016. "formal thesaurus" https://smartdefine.org/formal/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, formal thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/formal/thesaurus/synonyms>.
MLASmart Define. "formal thesaurus" 10 March 2016. Web. 23 September 2026. <https://smartdefine.org/formal/thesaurus/synonyms>