Upon vs. While

Uponpreposition

Physically above and in contact with.

Uponpreposition

Physically directly supported by.

Uponpreposition

Being followed by another so as to form a series.

Uponpreposition

At (a prescribed point in time).

Uponpreposition

On.

Uponadverb

Being the target of an action.

Uponpreposition

On; - used in all the senses of that word, with which it is interchangeable.

Whilenoun

An uncertain duration of time, a period of time.

Whileconjunction

During the same time that.

Whileconjunction

Although.

Whileconjunction

Until.

Whileconjunction

As long as.

Whilepreposition

Until.

Whileverb

(transitive) To pass (time) idly.

Whileverb

To loiter.

Whilenoun

Space of time, or continued duration, esp. when short; a time; as, one while we thought him innocent.

Whilenoun

That which requires time; labor; pains.

Whileverb

To cause to pass away pleasantly or without irksomeness or disgust; to spend or pass; - usually followed by away.

Whileverb

To loiter.

Whileconjunction

During the time that; as long as; whilst; at the same time that; as, while I write, you sleep.

Whileconjunction

Hence, under which circumstances; in which case; though; whereas.

Whilepreposition

Until; till.

Whilenoun

a period of indeterminate length (usually short) marked by some action or condition;

While

While is a word in the English language that functions both as a noun and as a subordinating conjunction. Its meaning varies largely based on its intended function, position in the phrase and even the writer or speaker's regional dialect.