bloodsucker vs annelid

bloodsucker and annelid both are nouns.

Word	Noun	Adjective	Verb	Adverb
bloodsucker	Yes	No	No	No
annelid	Yes	Yes	No	No

As nouns, annelid is a hypernym of bloodsucker; that is, annelid is a word with a broader meaning than bloodsucker:

bloodsucker: carnivorous or bloodsucking aquatic or terrestrial worms typically having a sucker at each end
annelid: worms with cylindrical bodies segmented both internally and externally

Other hypernyms of bloodsucker include annelid worm, segmented worm.

bloodsucker (noun)	annelid (noun)
carnivorous or bloodsucking aquatic or terrestrial worms typically having a sucker at each end	worms with cylindrical bodies segmented both internally and externally

bloodsucker (adjective)	annelid (adjective)
	relating to or belonging to or characteristic of any worms of the phylum Annelida