ravine vs gorge

ravine and gorge both are nouns.

Word	Noun	Adjective	Verb	Adverb
ravine	Yes	No	No	No
gorge	Yes	No	Yes	No

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

ravine: a deep narrow steep-sided valley (especially one formed by running water)
gorge: a deep ravine (usually with a river running through it)

Other hyponyms of ravine include canon, canyon.

ravine (noun)	gorge (noun)
a deep narrow steep-sided valley (especially one formed by running water)	the passage between the pharynx and the stomach
	a deep ravine (usually with a river running through it)
	a narrow pass (especially one between mountains)

ravine (verb)	gorge (verb)
	overeat or eat immodestly; make a pig of oneself