fruitful vs fat

fruitful is not a noun while fat is a noun.

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

fruitful (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)

fruitful (adjective)	fat (adjective)
productive or conducive to producing in abundance	having an (over)abundance of flesh
	containing or composed of fat
	marked by great fruitfulness
	lucrative
	having a relatively large diameter

fruitful (verb)	fat (verb)
	make fat or plump