gas jet vs gas ring

gas jet and gas ring both are nouns.

Word	Noun	Adjective	Verb	Adverb
gas jet	Yes	No	No	No
gas ring	Yes	No	No	No

As nouns, gas ring is a hyponym of gas jet; that is, gas ring is a word with a more specific, narrower meaning than gas jet:

gas jet: burner such that combustible gas issues from a nozzle to form a steady flame
gas ring: gas burner consisting of a circular metal pipe with several small holes through which gas can escape to be burned

Other hyponyms of gas jet include bunsen, bunsen burner, etna, pilot, pilot burner, pilot light.

gas jet (noun)	gas ring (noun)
burner such that combustible gas issues from a nozzle to form a steady flame	gas burner consisting of a circular metal pipe with several small holes through which gas can escape to be burned