Some music is written with 'block' chords, some has weaving parts around the tune, while some music has no harmony at all. These are all examples of different textures in music.

Music score
Music that has no chordal accompaniment, where different instruments or parts play or sing the same notes is described as in unison.
Listen to the sound extract below.
It is an example of unison: a male choir singing a traditional Armenian hymn.
This literally means 'sounding together'.
Homophonic music is played in block chords. Homophonic music is also sometimes called chordal music.
Here is an example of music with a homophonic texture, written by Henry VIII.
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