torch vs burner

torch and burner both are nouns.

Word	Noun	Adjective	Verb	Adverb
torch	Yes	No	Yes	No
burner	Yes	No	No	No

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

torch (noun)	burner (noun)
a small portable battery-powered electric lamp	an apparatus for burning fuel (or refuse)
a burner that mixes air and gas to produce a very hot flame	the heating elements of a stove or range on which pots and pans are placed for cooking
a light usually carried in the hand; consists of some flammable substance
tall-stalked very woolly mullein with densely packed yellow flowers; ancient Greeks and Romans dipped the stalks in tallow for funeral torches

torch (verb)	burner (verb)
burn maliciously, as by arson