smooch vs osculation

smooch and osculation both are nouns.

Word	Noun	Adjective	Verb	Adverb
smooch	Yes	No	Yes	No
osculation	Yes	No	No	No

As nouns, osculation is a hypernym of smooch; that is, osculation is a word with a broader meaning than smooch:

Other hypernyms of smooch include buss, kiss.

smooch (noun)	osculation (noun)
an enthusiastic kiss	the act of caressing with the lips (or an instance thereof)
	(mathematics) a contact of two curves (or two surfaces) at which they have a common tangent

smooch (verb)	osculation (verb)
snuggle and lie in a position where one person faces the back of the others