Generally considered non-comparable; only the positive degree is standard.
Translations
She had a myriad of ideas for the new project.
У нее было бесчисленное количество идей для нового проекта.
The myriad stars in the sky were breathtaking.
Многочисленные звезды на небе были захватывающими.
Definitions
Countless or extremely great in number. The myriad stars in the night sky were a breathtaking sight.
Composed of numerous and diverse elements; multifarious. The organization faces myriad challenges in different regions.