Synonyms for Caller:

n.

judge, card, book, commentary box, officiate, linesman. call up, call, cut off, answer, call-in, busy, call back, busy signal, dial. caller (noun)
cool, caller-out, caller-up, cooling, fresh, telephoner, phoner, company.
person (noun)
company.
visitor (noun)
visitant, guest, study at visitor, visitor.

Other synonyms:

visiting fireman, house guest, guest, commentary box, busy signal, visitor. linesman, boarder, stag, officiate. call back, dial. call-in, busy. call up. cut off, judge. book. card. call.

Usage examples for caller

  1. " I think I can bring York round, all right," Laura assured her caller – The Reclaimers by Margaret Hill McCarter
  2. He was followed, at a decent interval, by another caller – In Luck at Last by Walter Besant
  3. You see, he had a caller – The Bronze Bell by Louis Joseph Vance