igniter vs touchwood

igniter and touchwood both are nouns.

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

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

Other hyponyms of igniter include firelighter, kindling, punk, spunk, tinder, punk.

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