The Hebrew word for "faith" is "emunah". However, be aware that unlike in English, where we use "faith" as a noun i.e. "faith in ____", "emunah" is an action, similar in usage and meaning to support as in "support ____".
The word "faith" in English can be translated to אמונה, or "emunah". "emunah" implies taking action, as opposed to simply having passive faith, as in English.
