myriad

nouns

a large indefinite number
"he faced a myriad of details"
is a type of (narrower)
an indefinite quantity that is above the average in size or magnitude
the cardinal number that is the product of ten and one thousand

adjectives

too numerous to be counted
"incalculable riches"; "countless hours"; "an infinite number of reasons"; "innumerable difficulties"; "the multitudinous seas"; "myriad stars"; "untold thousands"