Many and Umteen

Many adjective - A quantifier that can be used with count nouns and is often preceded by `as' or `too' or `so' or `that'; amounting to a large but indefinite number.

Umteen and many are semantically related In some cases you can use "Umteen" instead an adjective "Many".

Umteen adjective - Innumerable but many.

Many and umteen are semantically related in very many topic. You can use "Many" instead an adjective "Umteen".