Movable do, or solfa, in which each syllable corresponds to a scale degree.
From the en.wikipedia.org
Unlike classical Western music, Carnatic music is notated almost exclusively in tonic solfa notation using either a Roman or Indic script to represent the solfa names.
From the en.wikipedia.org
More examples
Tonic solfa: a system of solmization using the solfa syllables: do, re, mi, fa, sol, la, ti
Solfa may refer to:
1. See tonic sol-fa. 2. By convention, the notes of the scale are assigned the names do-re-mi-fa-sol-la-ti-do, and this is often called "sol-fa notation". ...
The set of syllables used to represent the tones of the scale: do, re, mi, fa, sol, la, and ti.