sexual activity vs pinnacle

sexual activity and pinnacle both are nouns.

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

sexual activity (noun)	pinnacle (noun)
activities associated with sexual intercourse	(architecture) a slender upright spire at the top of a buttress or tower
	a lofty peak
	the highest level or degree attainable; the highest stage of development

sexual activity (verb)	pinnacle (verb)
	raise on or as if on a pinnacle
	surmount with a pinnacle