Collocations for belly - noun

empty, full
flat
round
big, huge, large
fat, pot
Since he turned 30 he's started to develop a pot belly.

bulging, protruding
bloated, distended, swollen
bare
beer (= from drinking too much beer)
pregnant (esp. AmE)

pat, rub, scratch
fill
I filled my belly with a sausage sandwich.

expose
Kayla lifted up her shirt to expose her round belly.

bulge
hang
He's so fat, his belly hangs over his shorts.

swell

in sb's belly
She felt the child in her belly kick.