premature ejaculation vs sexual activity

premature ejaculation and sexual activity both are nouns.

Word	Noun	Adjective	Verb	Adverb
premature ejaculation	Yes	No	No	No
sexual activity	Yes	No	No	No

premature ejaculation (noun)	sexual activity (noun)
ejaculation during the early stages of sexual excitement or soon after the insertion of the penis into the vagina	activities associated with sexual intercourse