The Finnish language has lent few loanwords to the English language; Finnish is rather a net importer of words from English.
However the following words of Finnish origin are some examples:
The most commonly used Finnish word in English is sauna, which has also been loaned to many other languages.
Words derived from Finnish used in more specialized fields:
In English, Finnish words used with reference to the Finnish culture, but not nativized in English and not used in other contexts: