10
accommodation(noun, place, house, space, home)
10
colourless
10
commonplace(adjective, dull, set, hard, simple)
10
directly
10
downright(adjective, complete, big, limited, manner)
10
explicit(adjective, strong, energetic, certain, definite)
10
feeble(adjective, dull, strong, weak, kind)
10
harsh(adjective, hard, severe, sharp, rough)
10
matte(adjective, dull, lackluster)
10
pedestrian(adjective, dull, set, simple, excite)
10
peremptory(adjective, manner, absolute, positive, affirmation)
10
pointless(adjective, dull, property, silly, ordinary)
10
prosy(adjective, dull, simple, tough, plain)
10
recumbent(adjective, smooth, level, down, even)
10
squat(noun, adjective, place, low, house)
10
tame(adjective, dull, weak, kind, simple)
10
tenement(noun, set, group, house, receptacle)
10
unexciting(adjective, dull, quiet, weak, slow)
10
wearisome(adjective, dull, weak, stupid, boring)
9
absolutely(adverb, big, limited, affirmation)
10 years ago|55k views|share |citing 
APASmart Define. (2016). flat thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/flat/thesaurus/synonyms
ChicagoSmart Define. 2016. "flat thesaurus" https://smartdefine.org/flat/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2016, flat thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/flat/thesaurus/synonyms>.
MLASmart Define. "flat thesaurus" 1 March 2016. Web. 20 September 2026. <https://smartdefine.org/flat/thesaurus/synonyms>