What Is Their Main Difference?
Parts of Speech
'While' is a conjunctive adverb. We use it to join two clauses together. 'During' is a preposition that is followed by a noun.
I studied hard
While as a Noun
'While' can be used as a noun. Note that 'while' cannot be used alone. It is often accompanied by 'in a...,' 'once in a...,' and 'worth your....' In this case, 'while' is often used to indicate data related to time.
She will stay here
We can all be weird
I couldn't get my hands on this volume
'While' and 'during' both mean the same thing. They show that two actions or events are happening at the same time. Watch: