answerer

answer +‎ -er

answerer (plural answerers)

1. A person or thing that answers or responds.
   • 1714, Jonathan Swift, The Publick Spirit of the Whigs, London: John Morphew, in Bertrand A. Goldgar and Ian Gadd (eds.), English Political Writings 1711-1714, The Cambridge Edition of the Works of Jonathan Swift, Cambridge University Press, 2008, p. 256,

     It is a very unfair Thing in any Writer to employ his Ignorance and Malice together, because it gives his Answerer double Work […]

   • 1855, Walt Whitman, “Song of the Answerer” in Leaves of Grass, New York: Modern Library, 1921, p. 141,

     Now list to my morning’s romanza, I tell the signs of the Answerer,

     To the cities and farms I sing as they spread in the sunshine before me.

   • 2004, Alan Hollinghurst, The Line of Beauty, Bloomsbury, 2005, Chapter 2,

     He prayed that Leo didn't think he was a fool. The other men in Leo’s life, anonymous partners, answerers of ads, old boyfriends, old Pete, massed impatiently behind him […]

• reanswer