sluttish vs sex activity

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

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

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

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