please tell me those common words that are used in day to day life.... i want to know the pronounciations.

I suggest you listen to them...for example, BBC for British and CNN or something for American

Take a look at these pages; but they don't mention pronunciation.

"The American and British English difference is relatively small. For those who have been studying British English, the list will help familiarize (American spelling) you with some of the main differences."

The bottom two links are more like what you are searching for:

Almost every word is pronounced differently. The accents are different, and that effects the entire spectrum of the languages.