neck vs necking

neck and necking both are nouns.

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

neck (noun)	necking (noun)
an opening in a garment for the neck of the wearer; a part of the garment near the wearer's neck	affectionate play (or foreplay without contact with the genital organs)
a narrow part of an artifact that resembles a neck in position or form	the molding at the top of a column
the part of an organism (human or animal) that connects the head to the rest of the body
a cut of meat from the neck of an animal
a narrow elongated projecting strip of land

neck (verb)	necking (verb)
kiss, embrace, or fondle with sexual passion