snuggling vs petting

snuggling and petting both are nouns.

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

As nouns, snuggling and petting are synonyms defined as:

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

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

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