120 entries under plain topic. ×

1
literal(adjective, simple, flat, ordinary)
1
lowly(adjective, simple, pure, ordinary)
1
lucid(adjective, quiet, clear, smooth, easy)
1
matter-of- fact(expression, adjective, simple, ordinary)
1
mild(adjective, dull, quiet, clear, smooth)
1
natural(adjective, simple, pure, modest)
1
not complex(expression, adjective, pure, modest)
1
nothing(adjective, simple, flat, ordinary)
1
nowhere(adjective, simple, flat, ordinary)
1
open and shut(expression, adjective, idiom, pure)
1
ordinary(adjective, simple, pure, modest)
1
pabulum(adjective, simple, flat, ordinary)
1
pedestrian(adjective, simple, ordinary, straightforward)
1
platitudinous(adjective, simple, flat, ordinary)
1
plebeian(adjective, simple, ordinary, straightforward)
1
practicable(adjective, simple, flat, ordinary)
1
practical(adjective, simple, flat, ordinary)
1
prose(adjective, simple, ordinary, straightforward)
1
prosy(adjective, simple, flat, ordinary)
1
pure and simple(expression, adjective, idiom, pure)
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APASmart Define. (2016). clean thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/clean/thesaurus/synonyms
ChicagoSmart Define. 2016. "clean thesaurus" https://smartdefine.org/clean/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, clean thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/clean/thesaurus/synonyms>.
MLASmart Define. "clean thesaurus" 29 March 2016. Web. 23 September 2026. <https://smartdefine.org/clean/thesaurus/synonyms>