sluttish vs sexual activity

sluttish is not a noun while sexual activity is a noun.

Word	Noun	Adjective	Verb	Adverb
sluttish	No	Yes	No	No
sexual activity	Yes	No	No	No

sluttish (noun)	sexual activity (noun)
	activities associated with sexual intercourse

sluttish (adjective)	sexual activity (adjective)
casual and unrestrained in sexual behavior
characteristic of or befitting a slut or slattern; used especially of women