Antonyms of adj cusped

1 sense of cusped

Sense 1
cuspate, cuspated, cusped, cuspidal, cuspidate, cuspidated -- (having cusps or points)

INDIRECT (VIA angular) -> rounded -- (curving and somewhat round in shape rather than jagged; "low rounded hills"; "rounded shoulders")

Similarity of adj cusped

1 sense of cusped

Sense 1
cuspate, cuspated, cusped, cuspidal, cuspidate, cuspidated -- (having cusps or points)
       => angular (vs. rounded), angulate -- (having angles or an angular shape)