transponder — a radio, radar, or sonar transceiver that automatically transmits a signal upon reception of a designated incoming signal.
Four-or-more syllable rhymes
andean condor — either of two large, New World vultures of the family Cathartidae, Gymnogyps californianus (California condor) or Vultur gryphus (Andean condor) the largest flying birds in the Western Hemisphere: the California condor is almost extinct; the Andean condor is greatly reduced in number and rare in many areas.
Four-or-more syllable rhymes
california condor — either of two large, New World vultures of the family Cathartidae, Gymnogyps californianus (California condor) or Vultur gryphus (Andean condor) the largest flying birds in the Western Hemisphere: the California condor is almost extinct; the Andean condor is greatly reduced in number and rare in many areas.