love seat vs couch

love seat and couch both are nouns.

Word	Noun	Adjective	Verb	Adverb
love seat	Yes	No	No	No
couch	Yes	No	Yes	No

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

Other hypernyms of love seat include lounge, sofa.

love seat (noun)	couch (noun)
small sofa that seats two people	an upholstered seat for more than one person
	a narrow bed on which a patient lies during psychiatric or psychoanalytic treatment
	a flat coat of paint or varnish used by artists as a primer

love seat (verb)	couch (verb)
	formulate in a particular style or language