articulator vs speech organ

articulator and speech organ both are nouns.

Word	Noun	Adjective	Verb	Adverb
articulator	Yes	No	No	No
speech organ	Yes	No	No	No

As nouns, speech organ is a hypernym of articulator; that is, speech organ is a word with a broader meaning than articulator:

Other hypernyms of articulator include organ of speech, vocal organ.

articulator (noun)	speech organ (noun)
a movable speech organ	any of the organs involved in speech production
someone who pronounces words