The difference between Mass noun and Uncountable

When used as nouns, mass noun means a noun that normally cannot be counted, whereas uncountable means an uncountable noun.

Uncountable is also adjective with the meaning: so many as to be incapable of being counted.

check bellow for the other definitions of Mass noun and Uncountable

Mass noun as a noun:

A noun that normally cannot be counted.

Examples:

"synonyms: material noun non-count noun [[uncountable]] noun"

"ant [[countable]] noun count noun"

Uncountable as an adjective:

So many as to be incapable of being counted.

Examples:

"The reasons for our failure were as uncountable as the grains of sand on a beach."
Uncountable as an adjective (mathematics):

Incapable of being put into one-to-one correspondence with the natural numbers or any subset thereof.

Examples:

"Cantor’s “diagonal proof” shows that the set of real numbers is uncountable."
Uncountable as an adjective (grammar, of a noun):

Describes a meaning of a noun that cannot be used freely with numbers or the indefinite article, and which therefore usually takes no plural form. Example: information.

Examples:

"Many languages do not distinguish countable nouns from uncountable nouns."

"One meaning in law of the supposedly uncountable noun "information" is used in the plural and is countable."