sex activity vs sloppy

sex activity is a noun but sloppy is not a noun.

Word	Noun	Adjective	Verb	Adverb
sex activity	Yes	No	No	No
sloppy	No	Yes	No	No

sex activity (noun)	sloppy (noun)
activities associated with sexual intercourse

sex activity (adjective)	sloppy (adjective)
	marked by great carelessness
	excessively or abnormally emotional
	not fitting closely; hanging loosely
	lacking neatness or order
	(of soil) soft and watery
	wet or smeared with a spilled liquid or moist material