unisonal Definition

unison
noun

1. music.
The interval between two notes of the same pitch, or which are one or more octaves apart.
2. The state of acting all in the same way at the same time.
3. Complete agreement.

Thesaurus: unity, concert, conjunction, accord, harmony, cooperation, agreement, unanimity, concord; Antonym: discord.
Form: in unison (usually)

Derivative: unisonal
adj

Etymology: 16c: from Latin unus one + sonus sound.