formulate vs couch

formulate is not a noun while couch is a noun.

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

As verbs, couch is a hyponym of formulate; that is, couch is a word with a more specific, narrower meaning than formulate:

Other hyponyms of formulate include ask, lexicalise, lexicalize, dogmatise, dogmatize, formularise, formularize, cast, frame, put, redact.

formulate (noun)	couch (noun)
	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

formulate (verb)	couch (verb)
put into words or an expression	formulate in a particular style or language
elaborate, as of theories and hypotheses
come up with (an idea, plan, explanation, theory, or principle) after a mental effort
prepare according to a formula