harmony

noun
UK /ˈhɑː.mə.ni/
US /ˈhɑːr.mə.ni/

Harmony is when people or things get along well together.

The two friends sang in perfect harmony.


OTHER MEANINGS

2. A pleasing combination of musical notes played or sung at the same time.

The choir sang the harmony while the soloist sang the melody.

3. A state of peaceful agreement between people or groups.

The neighbors lived in harmony for many years.

4. A pleasing arrangement of parts that fit well together.

The colors of the garden were in harmony with each other.