pilot light vs pilot burner

pilot light and pilot burner both are nouns.

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

As nouns, pilot light and pilot burner are synonyms defined as:

pilot light and pilot burner: small auxiliary gas burner that provides a flame to ignite a larger gas burner

Other synonyms of pilot light include pilot.

pilot light (noun)	pilot burner (noun)
indicator consisting of a light to indicate whether power is on or a motor is in operation	small auxiliary gas burner that provides a flame to ignite a larger gas burner
small auxiliary gas burner that provides a flame to ignite a larger gas burner