Fasciola hepatica vs fluke

Fasciola hepatica and fluke both are nouns.

Word	Noun	Adjective	Verb	Adverb
Fasciola hepatica	Yes	No	No	No
fluke	Yes	No	No	No

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

Fasciola hepatica: flatworm parasitic in liver and bile ducts of domestic animals and humans
fluke: parasitic flatworms having external suckers for attaching to a host

Other hypernyms of Fasciola hepatica include trematode, trematode worm.

Fasciola hepatica (noun)	fluke (noun)
flatworm parasitic in liver and bile ducts of domestic animals and humans	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