osculation vs sexual activity

osculation and sexual activity both are nouns.

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

osculation (noun)	sexual activity (noun)
the act of caressing with the lips (or an instance thereof)	activities associated with sexual intercourse
(mathematics) a contact of two curves (or two surfaces) at which they have a common tangent