deep kiss vs soul kiss

deep kiss and soul kiss both are nouns.

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

As nouns, deep kiss and soul kiss are synonyms defined as:

deep kiss and soul kiss: an openmouthed kiss in which your tongue is inserted into the other's mouth

Other synonyms of deep kiss include French kiss.

deep kiss (noun)	soul kiss (noun)
an openmouthed kiss in which your tongue is inserted into the other's mouth	an openmouthed kiss in which your tongue is inserted into the other's mouth