responder vs examinee

responder and examinee both are nouns.

Word	Noun	Adjective	Verb	Adverb
responder	Yes	No	No	No
examinee	Yes	No	No	No

As nouns, examinee is a hyponym of responder; that is, examinee is a word with a more specific, narrower meaning than responder:

responder: someone who responds
examinee: someone who is tested (as by an intelligence test or an academic examination)

Other hyponyms of responder include assenter, equivocator, hedger, tergiversator, interviewee, testee.

responder (noun)	examinee (noun)
someone who responds	someone who is tested (as by an intelligence test or an academic examination)