FLAT Synonyms: 565 Similar and Opposite Words - Merriam-Webster
https://www.merriam-webster.com/thesaurus/flat
WebMerriam-Webster unabridged. Synonyms for FLAT: exact, round, precise, even, boring, slow, tiring, dull; Antonyms of FLAT: relative, near, comparative, approximate, imprecise, interesting, involving, spectacular.
DA: 87 PA: 100 MOZ Rank: 69 Up or Down: Up