sex activity vs safe

sex activity and safe both are nouns.

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

sex activity (noun)	safe (noun)
activities associated with sexual intercourse	strongbox where valuables can be safely kept
	contraceptive device consisting of a sheath of thin rubber or latex that is worn over the penis during intercourse
	a ventilated or refrigerated cupboard for securing provisions from pests

sex activity (adjective)	safe (adjective)
	free from danger or the risk of harm
	having reached a base without being put out
	financially safe
	(of an undertaking) secure from risk