120 entries under plain topic. ×

4
dead(adjective, adverb, simple, flat)
4
elementary(adjective, clear, easy, pure)
4
unadorned(adjective, simple, pure, ordinary)
4
unalloyed(adjective, simple, pure, modest)
4
uncomplicated(adjective, clear, simple, easy)
4
unqualified(adjective, simple, pure, modest)
3
classic(adjective, simple, perfect, pure)
3
dry(verb, adjective, simple, flat)
3
easy(adjective, simple, modest, straightforward)
3
unvarnished(adjective, simple, honest, pure)
3
vanilla(adjective, simple, pure, dirty)
2
cool(adjective, clear, simple, bright)
2
unblended(adjective, simple, pure, modest)
2
undecorated(adjective, simple, pure, ordinary)
2
unembellished(adjective, simple, pure, ordinary)
2
unmitigated(adjective, simple, pure, modest)
1
Spartan(adjective, simple, pure, modest)
1
actual(adjective, simple, ordinary, straightforward)
1
banal(adjective, simple, flat, ordinary)
1
colorless(adjective, simple, ordinary, straightforward)
10 years ago|68k views|share |citing 
APASmart Define. (2016). clean thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/clean/thesaurus/synonyms
ChicagoSmart Define. 2016. "clean thesaurus" https://smartdefine.org/clean/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2016, clean thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/clean/thesaurus/synonyms>.
MLASmart Define. "clean thesaurus" 29 March 2016. Web. 20 September 2026. <https://smartdefine.org/clean/thesaurus/synonyms>