skimmer vs reader

skimmer and reader both are nouns.

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

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

skimmer (noun)	reader (noun)
gull-like seabird that flies along the surface of the water with an elongated lower mandible immersed to skim out food	one of a series of texts for students learning to read
a stiff hat made of straw with a flat crown	a person who enjoys reading
a cooking utensil used to skim fat from the surface of liquids	a public lecturer at certain universities
a rapid superficial reader	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