CRT spot DM display Doppler signal IF signal IM display RF echoes accord acknowledge acknowledgment act like action and reaction adumbration affect agree agree in opinion agree with answer answer back answering antiphon antiphonal chanting antiphony ape assume automatic reaction autonomic reaction back answer back talk backchat be affected be in tune be inspired be involved be moved be reflected be sent back beam beat signal blips boom booming borrow bounce back bounceback bounces care about caring catch the flame catch the infection change color chime in with choir chord chorus claviature close with coincide color with emotion come again come back come back at come up again comeback concern concur conform to conformist console copier copy copycat copyist counterfeit counterfeiter crib cuckoo dig display dissembler dissimulator ditto do do a repeat do again do like do over double double-dot display doubling duplicate duplication echo back echo signal echoer echoist eighty-eight empathize with empathy emulate encore evasive reply facsimile fake faker fall in with fellow feeling fingerboard flash back forge forger give acknowledgment give answer go along with go back go like go with great growl growling grumble grumbling hoke hoke up hypocrite identification identify with imitate imitation imitator impersonator impostor involvement iteration ivories keep coming keyboard keys local oscillator signal make like manual meet mime mimer mimic mimicker mirror mirror image mocker mockingbird monkey organ manual outline output signal parrot pathos pedals phony piano keys picture pips plagiarism plagiarist plagiarize poll-parrot polly polly-parrot poseur predictable response quotation quote radar signal react reaction reading ready reply reappear reappearance rebirth reboation rebound receipt recur recurrence redo redouble redoubling reduplicate reduplication reecho reflect reflection reflex reflex action refluence reflux regurgitate regurgitation reincarnate reincarnation reiteration rejoin rejoinder relate to emotionally relating renew renewal reoccur reoccurrence repartee repeat repeat performance repercussion repetition replica replication reply repost reproduce reproduction rescript rescription resound resounding respond respondence response responsion responsiveness responsory responsory report resume resumption retort retroaction return return answer return for answer return signal reverberate reverberation revert revive revulsion ring riposte rise roll rumble rumbling say say again say in reply send back shadow