Synonyms of flattest

1 Syllable
splay, low, flush
2 Syllables
even, planar, fallen, empty, plane, prone
3 Syllables
collapsed, decumbent, oblate, punctured, tabular, recumbent, outstretched, prostrate, deflated, extended, pancake, unbroken, reclining, procumbent, supine, planate, depressed
4 Syllables
complanate, horizontal