necking

(noun) the molding at the top of a column. Synonyms: gorgerin.

(noun) affectionate play (or foreplay without contact with the genital organs). Synonyms: caressing, cuddling, fondling, hugging, kissing, petting, smooching, snuggling.

(verb) kiss, embrace, or fondle with sexual passion. Synonyms: neck, make out. Example: "The couple were necking in the back seat of the car."