responder

Từ điển WordNet v3.1 - WordNet Dictionary

noun

someone who responds
• Syn:
respondent, answerer
• Derivationally related forms:
answer (for: answerer), respond, respondent (for: respondent), respond (for: respondent)
• Hypernyms:
communicator
• Hyponyms:
assenter, hedger, equivocator, tergiversator, interviewee,
testee, examinee