smooch vs kiss

smooch and kiss both are nouns.

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

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

Other hypernyms of smooch include buss, osculation.

smooch (noun)	kiss (noun)
an enthusiastic kiss	the act of caressing with the lips (or an instance thereof)
	a light glancing touch
	any of several bite-sized candies
	a cookie made of egg whites and sugar

smooch (verb)	kiss (verb)
snuggle and lie in a position where one person faces the back of the others	touch with the lips or press the lips (against someone's mouth or other body part) as an expression of love, greeting, etc.
	touch lightly or gently