canoe vs birchbark

canoe and birchbark both are nouns.

Word	Noun	Adjective	Verb	Adverb
canoe	Yes	No	Yes	No
birchbark	Yes	No	No	No

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

Other hyponyms of canoe include birch bark, birchbark canoe, dugout, dugout canoe, pirogue, kayak, outrigger canoe.

canoe (noun)	birchbark (noun)
small and light boat; pointed at both ends; propelled with a paddle	a canoe made with the bark of a birch tree

canoe (verb)	birchbark (verb)
travel by canoe