torch vs penlight

torch and penlight both are nouns.

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

As nouns, penlight is a hyponym of torch; that is, penlight is a word with a more specific, narrower meaning than torch:

torch (noun)	penlight (noun)
a small portable battery-powered electric lamp	a small flashlight resembling a fountain pen
a burner that mixes air and gas to produce a very hot flame
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)	penlight (verb)
burn maliciously, as by arson