pilot burner vs gas burner

pilot burner and gas burner both are nouns.

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

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

pilot burner: small auxiliary gas burner that provides a flame to ignite a larger gas burner
gas burner: burner such that combustible gas issues from a nozzle to form a steady flame

Other hypernyms of pilot burner include gas jet.

pilot burner (noun)	gas burner (noun)
small auxiliary gas burner that provides a flame to ignite a larger gas burner	burner such that combustible gas issues from a nozzle to form a steady flame