couch vs primer

couch and primer both are nouns.

Word	Noun	Adjective	Verb	Adverb
couch	Yes	No	Yes	No
primer	Yes	No	No	No

As nouns, primer is a hypernym of couch; that is, primer is a word with a broader meaning than couch:

Other hypernyms of couch include flat coat, ground, primer coat, priming, priming coat, undercoat.

couch (noun)	primer (noun)
an upholstered seat for more than one person	any igniter that is used to initiate the burning of a propellant
a narrow bed on which a patient lies during psychiatric or psychoanalytic treatment	the first or preliminary coat of paint or size applied to a surface
a flat coat of paint or varnish used by artists as a primer	an introductory textbook

couch (verb)	primer (verb)
formulate in a particular style or language