98 entries under plain topic. ×

9
guileless(adjective, open, free, honest)
9
outspoken(adjective, open, direct, free, easy)
8
outright(adjective, adverb, open, free, honest)
8
scrupulous(adjective, feature, characteristic, good, close)
8
simple(adjective, clear, flat, clean, honest)
8
unadulterated(adjective, strong, clean, rich)
8
unmixed(adjective, strong, clean, rich)
7
explicit(adjective, clear, correct, easy, flat)
7
transparent(adjective, open, direct, free, easy)
7
unalloyed(adjective, simple, bright, clean)
7
unequivocal(adjective, clear, open, flat, honest)
7
unvarnished(adjective, direct, honest, straightforward)
5
concentrated(adjective, strong, hard, sharp)
5
full-strength(adjective, strong, clean, neat)
5
natural(adjective, open, direct, free, simple)
5
unambiguous(adjective, easy, honest, straightforward)
5
unreserved(adjective, clear, show, open, direct)
4
aligned(adjective, calm, smooth, flat)
4
categorical(adjective, open, flat, honest, total)
4
flawless(adjective, simple, correct, bright, clean)
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APASmart Define. (2015). straight thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/straight/thesaurus/synonyms
ChicagoSmart Define. 2015. "straight thesaurus" https://smartdefine.org/straight/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, straight thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/straight/thesaurus/synonyms>.
MLASmart Define. "straight thesaurus" 12 November 2015. Web. 20 September 2026. <https://smartdefine.org/straight/thesaurus/synonyms>