necking vs hugging

necking and hugging both are nouns.

Word	Noun	Adjective	Verb	Adverb
necking	Yes	No	No	No
hugging	Yes	No	No	No

As nouns, necking and hugging are synonyms defined as:

necking and hugging: affectionate play (or foreplay without contact with the genital organs)

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

necking (noun)	hugging (noun)
affectionate play (or foreplay without contact with the genital organs)	affectionate play (or foreplay without contact with the genital organs)
the molding at the top of a column