articulate vs furnish

articulate is an adjective but furnish is not an adjective.

Word	Noun	Adjective	Verb	Adverb
articulate	No	Yes	Yes	No
furnish	No	No	Yes	No

As verbs, furnish is a hypernym of articulate; that is, furnish is a word with a broader meaning than articulate:

Other hypernyms of articulate include offer, provide, render, supply.

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

articulate (verb)	furnish (verb)
speak, pronounce, or utter in a certain way	give something useful or necessary to
express or state clearly	provide or equip with furniture
put into words or an expression
provide with a joint
unite by forming a joint or joints