Synonyms of concave

1 Syllable
dug, round
2 Syllables
deep-set, crescent, dipped, scooped, digging, vaulted, chasmal, sunken, dented, catting, rounded, catted, sagging, sinking, hollow, cupped, dimpled
3 Syllables
cup-shaped, incurved, bow-shaped, chambered, hollowed, socketed, indented, cavernous, hollowest, convexed, incurve, hollower, falcate, hollowing, crescentic, caved-in, fallen-in, troughlike
4 Syllables
crescent-shaped, biconcave, incurvated, incurvate, excavated, crescentiform
5 Syllables
semicircular, infundibular