retroflex vs enunciate

retroflex is an adjective but enunciate is not an adjective.

Word	Noun	Adjective	Verb	Adverb
retroflex	No	Yes	Yes	No
enunciate	No	No	Yes	No

As verbs, enunciate is a hypernym of retroflex; that is, enunciate is a word with a broader meaning than retroflex:

retroflex: articulate (a consonant) with the tongue curled back against the palate
enunciate: speak, pronounce, or utter in a certain way

Other hypernyms of retroflex include articulate, enounce, pronounce, say, sound out.

retroflex (adjective)	enunciate (adjective)
bent or curved backward
pronounced with the tip of the tongue turned back toward the hard palate

retroflex (verb)	enunciate (verb)
articulate (a consonant) with the tongue curled back against the palate	express or state clearly
bend or turn backward	speak, pronounce, or utter in a certain way