Answer: unisons

AnswerCrossword Clue
UNISONSAgreements
UNISONSConcerts
UNISONSSynchronized states
unisonsSimultaneous performance of action or utterance of speech
unisonsUNISON, complete agreement
unisonsCoincidence in pitch of sounds or notes
unisonsA combination of notes, voices, or instruments at the same pitch or (esp. when singing) in octaves