bunsen vs gas burner

bunsen and gas burner both are nouns.

Word	Noun	Adjective	Verb	Adverb
bunsen	Yes	No	No	No
gas burner	Yes	No	No	No

As nouns, gas burner is a hypernym of bunsen; that is, gas burner is a word with a broader meaning than bunsen:

bunsen: a gas burner used in laboratories; has an air valve to regulate the mixture of gas and air
gas burner: burner such that combustible gas issues from a nozzle to form a steady flame

Other hypernyms of bunsen include gas jet.

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