foreplay vs cuddling

foreplay and cuddling both are nouns.

Word	Noun	Adjective	Verb	Adverb
foreplay	Yes	No	No	No
cuddling	Yes	No	No	No

As nouns, cuddling is a hyponym of foreplay; that is, cuddling is a word with a more specific, narrower meaning than foreplay:

foreplay: mutual sexual fondling prior to sexual intercourse
cuddling: affectionate play (or foreplay without contact with the genital organs)

Other hyponyms of foreplay include caressing, fondling, hugging, kissing, necking, petting, smooching, snuggling, feel.

foreplay (noun)	cuddling (noun)
mutual sexual fondling prior to sexual intercourse	affectionate play (or foreplay without contact with the genital organs)