phrase vs lexicalize

phrase is a noun but lexicalize is not a noun.

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

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

phrase: put into words or an expression
lexicalize: make or coin into a word or accept a new word into the lexicon of a language

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

phrase (noun)	lexicalize (noun)
dance movements that are linked in a single choreographic sequence
an expression consisting of one or more words forming a grammatical constituent of a sentence
a short musical passage
an expression whose meanings cannot be inferred from the meanings of the words that make it up

phrase (verb)	lexicalize (verb)
put into words or an expression	make or coin into a word or accept a new word into the lexicon of a language
divide, combine, or mark into phrases