touchwood vs igniter

touchwood and igniter both are nouns.

Word	Noun	Adjective	Verb	Adverb
touchwood	Yes	No	No	No
igniter	Yes	No	No	No

As nouns, igniter is a hypernym of touchwood; that is, igniter is a word with a broader meaning than touchwood:

Other hypernyms of touchwood include ignitor, lighter.

touchwood (noun)	igniter (noun)
material for starting a fire	a device for lighting or igniting fuel or charges or fires
	a substance used to ignite or kindle a fire