Myriad
Part of speech: noun
Definition: Ten thousand; 10,000. A countless number or multitude (of specified things).
Part of speech: adjective
Definition: Great in number; innumerable, multitudinous.
Example sentence: I think it's important to make art for a myriad of reasons. The least of which is that I think laughter is medicinal, and I think there is an escapism aspect - an act of self-care.
Innumerable
Part of speech: adjective
Definition: Not capable of being counted, enumerated, or numbered, hence, indefinitely numerous; of great number.