articulate vs give voice

articulate is an adjective but give voice is not an adjective.

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

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

Other synonyms of articulate include formulate, phrase, word.

articulate (adjective)	give voice (adjective)
expressing yourself easily or characterized by clear expressive language
consisting of segments held together by joints

articulate (verb)	give voice (verb)
speak, pronounce, or utter in a certain way	put into words or an expression
express or state clearly
put into words or an expression
provide with a joint
unite by forming a joint or joints