drinking vs gulping

drinking and gulping both are nouns.

Word	Noun	Adjective	Verb	Adverb
drinking	Yes	No	No	No
gulping	Yes	No	No	No

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

Other hyponyms of drinking include guzzling, swilling, potation.

drinking (noun)	gulping (noun)
the act of consuming liquids	the drinking of large mouthfuls rapidly
the act of drinking alcoholic beverages to excess	a spasmodic reflex of the throat made as if in swallowing