soul kiss vs buss

soul kiss and buss both are nouns.

Word	Noun	Adjective	Verb	Adverb
soul kiss	Yes	No	No	No
buss	Yes	No	Yes	No

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

soul kiss: an openmouthed kiss in which your tongue is inserted into the other's mouth
buss: the act of caressing with the lips (or an instance thereof)

Other hypernyms of soul kiss include kiss, osculation.

soul kiss (noun)	buss (noun)
an openmouthed kiss in which your tongue is inserted into the other's mouth	the act of caressing with the lips (or an instance thereof)

soul kiss (verb)	buss (verb)
	touch with the lips or press the lips (against someone's mouth or other body part) as an expression of love, greeting, etc.