Enneatonic
An enneatonic scale (occasionally called a nonatonic scale) is a scale with 9 tones per equave.
Enneatonic mos scales may be found at Enneatonic MOS. Other enneatonic scales may be found at Category: 9-tone scales.
Godzilla, titanium, triforce, and mavila (or more accurately trismegistus) are good examples of temperaments that contain 9-note mos scales found in low edos.