Wild card

[rabet]

Apologies in advance if this is a naive question. Are there any search engines on the internet that allow for the use of wild cards? I'm thinking of a situation where you don't have all the letters of a word you wish to look up, but you do know how many letters the word has.

[OBonio]

http://www.tech-recipes.com/google_tips224.html

[rabet]

Thanks OBonio.