smooching vs petting

smooching and petting both are nouns.

Word	Noun	Adjective	Verb	Adverb
smooching	Yes	No	No	No
petting	Yes	No	No	No

As nouns, smooching and petting are synonyms defined as:

smooching and petting: affectionate play (or foreplay without contact with the genital organs)

Other synonyms of smooching include caressing, cuddling, fondling, hugging, kissing, necking, snuggling.

smooching (noun)	petting (noun)
affectionate play (or foreplay without contact with the genital organs)	affectionate play (or foreplay without contact with the genital organs)