Answer: inunison

AnswerCrossword Clue
INUNISONTogether
INUNISONAs one
INUNISONOf one accord
INUNISONAt the same pitch
INUNISONCorresponding exactly
INUNISONHow a chorus may sing
INUNISONHarmoniously
INUNISONAll together
INUNISONAt the same time
INUNISONAll together now
INUNISONHarmonized