## As nouns the difference between **one** and **ephemeral**

is that

**one** is (mathematics) the neutral element with respect to multiplication in a while

**ephemeral** is something which lasts for a short period of time.

## As adjectives the difference between **one** and **ephemeral**

is that

**one** is of a period of time, being particular; as, one morning, one year while

**ephemeral** is lasting for a short period of time.

## As a numeral **one**

is (cardinal) a numerical value equal to ; the first number in the set of natural numbers (especially in number theory); the cardinality of the smallest nonempty set ordinal: first.

## As a pronoun **one**

is (impersonal pronoun) one thing (among a group of others); one member of a group.

## As a verb **one**

is (obsolete|transitive) to cause to become one; to gather into a single whole; to unite.