bookworm vs reader

bookworm and reader both are nouns.

Word	Noun	Adjective	Verb	Adverb
bookworm	Yes	No	No	No
reader	Yes	No	No	No

As nouns, reader is a hypernym of bookworm; that is, reader is a word with a broader meaning than bookworm:

bookworm (noun)	reader (noun)
someone who spends a great deal of time reading	one of a series of texts for students learning to read
a person who pays more attention to formal rules and book learning than they merit	a person who enjoys reading
	a public lecturer at certain universities
	someone who contracts to receive and pay for a service or a certain number of issues of a publication
	a person who can read; a literate person
	someone who reads proof in order to find errors and mark corrections
	someone who reads manuscripts and judges their suitability for publication
	someone who reads the lessons in a church service; someone ordained in a minor order of the Roman Catholic Church