fly rod vs fishing pole

fly rod and fishing pole both are nouns.

Word	Noun	Adjective	Verb	Adverb
fly rod	Yes	No	No	No
fishing pole	Yes	No	No	No

As nouns, fishing pole is a hypernym of fly rod; that is, fishing pole is a word with a broader meaning than fly rod:

fly rod: a long flexible fishing rod used in fly fishing
fishing pole: a rod of wood or steel or fiberglass that is used in fishing to extend the fishing line

Other hypernyms of fly rod include fishing rod.

fly rod (noun)	fishing pole (noun)
a long flexible fishing rod used in fly fishing	a rod of wood or steel or fiberglass that is used in fishing to extend the fishing line