rounded vs fat

rounded is not a noun while fat is a noun.

Word	Noun	Adjective	Verb	Adverb
rounded	No	Yes	No	No
fat	Yes	Yes	Yes	No

rounded (noun)	fat (noun)
	excess bodily weight
	a kind of body tissue containing stored fat that serves as a source of energy; it also cushions and insulates vital organs
	a soft greasy substance occurring in organic tissue and consisting of a mixture of lipids (mostly triglycerides)

rounded (adjective)	fat (adjective)
curving and somewhat round in shape rather than jagged	having an (over)abundance of flesh
	containing or composed of fat
	marked by great fruitfulness
	lucrative
	having a relatively large diameter

rounded (verb)	fat (verb)
	make fat or plump