sex activity vs efflorescence

sex activity and efflorescence both are nouns.

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

sex activity (noun)	efflorescence (noun)
activities associated with sexual intercourse	a powdery deposit on a surface
	the time and process of budding and unfolding of blossoms
	any red eruption of the skin
	the period of greatest prosperity or productivity