100 entries under friendly topic. ×

65
honest(adjective, feature, characteristic, good, person)
40
earnest(noun, adjective, feeling, open, pleasant)
37
candid(adjective, feature, characteristic, good, strong)
37
frank(noun, adjective, feature, characteristic, good)
36
straightforward(adjective, feature, characteristic, good, clear)
34
open(adjective, feature, characteristic, good, clear)
27
heartfelt(adjective, open, great, pleasant, keen)
27
ingenuous(adjective, good, open, direct, free)
24
artless(adjective, open, direct, free, simple)
17
guileless(adjective, open, direct, free, simple)
17
plain(adjective, good, clear, open, direct)
16
unreserved(adjective, person, open, direct, free)
13
fair(adjective, feature, characteristic, good, honor)
13
natural(adjective, open, direct, free, simple)
12
hearty(adjective, person, feeling, open, great)
11
wholehearted(adjective, person, open, pleasant, keen)
9
warm(adjective, open, kind, pleasant, keen)
8
on the level(expression, adjective, idiom, good, close)
8
proper(adjective, feature, characteristic, good, honor)
7
cordial(adjective, feeling, pleasant, warm)
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APASmart Define. (2016). sincere thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/sincere/thesaurus/synonyms
ChicagoSmart Define. 2016. "sincere thesaurus" https://smartdefine.org/sincere/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, sincere thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/sincere/thesaurus/synonyms>.
MLASmart Define. "sincere thesaurus" 31 March 2016. Web. 25 September 2026. <https://smartdefine.org/sincere/thesaurus/synonyms>