phrase vs couch

phrase and couch both are nouns.

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

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

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

phrase (noun)	couch (noun)
dance movements that are linked in a single choreographic sequence	an upholstered seat for more than one person
an expression consisting of one or more words forming a grammatical constituent of a sentence	a narrow bed on which a patient lies during psychiatric or psychoanalytic treatment
a short musical passage	a flat coat of paint or varnish used by artists as a primer
an expression whose meanings cannot be inferred from the meanings of the words that make it up

phrase (verb)	couch (verb)
put into words or an expression	formulate in a particular style or language
divide, combine, or mark into phrases