Moby thesaurus: bagging, baggy, ballooning, bellying, billowing, billowy, bloated, bosomy, bulbose, bulbous, bulging, bumped, bumpy, bunched, bunchy, distended, hummocky, moutonnee, pneumatic, potbellied, pouching, rounded, swelling, verrucated, verrucose, warty ... show more.
Find more on hillocky elsewhere: etymology - rhymes - Wikipedia.
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