word vs give voice

word is a noun but give voice is not a noun.

Word	Noun	Adjective	Verb	Adverb
word	Yes	No	Yes	No
give voice	No	No	Yes	No

As verbs, word and give voice are synonyms defined as:

Other synonyms of word include articulate, formulate, phrase.

word (noun)	give voice (noun)
a unit of language that native speakers can identify
a promise
information about recent and important events
a brief statement
an exchange of views on some topic
a secret word or phrase known only to a restricted group
a verbal command for action
a string of bits stored in computer memory

word (verb)	give voice (verb)
put into words or an expression	put into words or an expression