lighter vs device

lighter and device both are nouns.

Word	Noun	Adjective	Verb	Adverb
lighter	Yes	No	Yes	No
device	Yes	No	No	No

As nouns, device is a hypernym of lighter; that is, device is a word with a broader meaning than lighter:

lighter (noun)	device (noun)
a device for lighting or igniting fuel or charges or fires	any clever maneuver
a flatbottom boat for carrying heavy loads (especially on canals)	an instrumentality invented for a particular purpose
a substance used to ignite or kindle a fire	an emblematic design (especially in heraldry)
	any ornamental pattern or design (as in embroidery)
	something in an artistic work designed to achieve a particular effect

lighter (verb)	device (verb)
transport in a flatbottom boat