blood fluke vs fluke

blood fluke and fluke both are nouns.

Word	Noun	Adjective	Verb	Adverb
blood fluke	Yes	No	No	No
fluke	Yes	No	No	No

As nouns, fluke is a hypernym of blood fluke; that is, fluke is a word with a broader meaning than blood fluke:

Other hypernyms of blood fluke include trematode, trematode worm.

blood fluke (noun)	fluke (noun)
flatworms parasitic in the blood vessels of mammals	parasitic flatworms having external suckers for attaching to a host
	either of the two lobes of the tail of a cetacean
	flat bladelike projection on the arm of an anchor
	a barb on a harpoon or arrow
	a stroke of luck