Webster's Revised Unabridged Dictionary · 1913

Infinitude

Infinitude , noun

1.
The quality or state of being infinite, or without limits; infiniteness.
2.
Infinite extent; unlimited space; immensity; infinity.
I am who fill infinitude. — Milton
As pleasing to the fancy, as speculations of eternity or infinitude are to the understanding. — Addison
3.
Boundless number; countless multitude.
An infinitude of distinctions. — Addison