responder

About 0.40 uses per million words.

Meaning

1. noun One who responds.
2. noun A person who responds to an emergency situation or other summons.

   911 responders arrived at the scene within five minutes after the call.

Similar words

respondent answerer reply response answer interviewee intervenor intervener discussant intervening

Often followed by

to cells is and has a should can may

Word family

respond responded responders responding responds