osculation vs touching

osculation and touching both are nouns.

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

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

Other hypernyms of osculation include touch.

osculation (noun)	touching (noun)
the act of caressing with the lips (or an instance thereof)	the act of putting two things together with no space between them
(mathematics) a contact of two curves (or two surfaces) at which they have a common tangent	the event of something coming in contact with the body

osculation (adjective)	touching (adjective)
	arousing affect