Antonyms of adj costate

2 senses of costate

Sense 1
costate, ribbed -- ((of the surface) having a rough, riblike texture)

INDIRECT (VIA rough) -> smooth -- (having a surface free from roughness or bumps or ridges or irregularities; "smooth skin"; "a smooth tabletop"; "smooth fabric"; "a smooth road"; "water as smooth as a mirror")

Sense 2
costate -- (having ribs)

INDIRECT (VIA ribbed) -> ribless -- (having no ribs or no visible ribs)

Similarity of adj costate

2 senses of costate

Sense 1
costate, ribbed -- ((of the surface) having a rough, riblike texture)
       => rough (vs. smooth), unsmooth -- (having or caused by an irregular surface; "trees with rough bark"; "rough ground"; "rough skin"; "rough blankets"; "his unsmooth face")

Sense 2
costate -- (having ribs)
       => ribbed (vs. ribless) -- (furnished or strengthened with ribs)