Best method to search if a word exist in an array

Hi,

I want to search if a given word exists in an important array (About 10000 to 30000 words)of words whose structure is as follows:

I know several methods to do this (tokenat, indexOf, find etc ..)

I specify that currently I use the function "contains value" of the array

but I would like to know which method is the most efficient and fast to do this?

Thank you

dop2000 Curious that nobody has already done :)

Otherwise the use of the function "contains value" does not suit me finally because it does not seem to return the pointer and I need to recover the string and the number after the decimal point in the array.

For example i search for "BODY" and the pointer return me "BODY,16" or "3", the index ine array.

So, do I have to go through a loop for that inevitably?

Finally , i find the method :

Mots.At(Mots.indexOf(string)) //for string Mots.At(Mots.indexOf(string),1) //for number

It return me the number, But I do not know if it's really optimal ^^