gas jet vs etna

gas jet and etna both are nouns.

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

As nouns, etna is a hyponym of gas jet; that is, etna 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
etna: a gas burner used in laboratories; has an air valve to regulate the mixture of gas and air

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

gas jet (noun)	etna (noun)
burner such that combustible gas issues from a nozzle to form a steady flame	a gas burner used in laboratories; has an air valve to regulate the mixture of gas and air