However, you can use "fail" as part of a larger word, such as:
* Fail-safe: A system designed to prevent a failure.
* Fail-fast: A method for rapidly identifying and resolving failures.
You can also use prefixes to create new words:
* Unfailing: Never failing; constant.
* Misfail: To fail to succeed in a particular way.
Keep in mind that "fail" is often used as a verb and is not typically used as a base word to create other words with suffixes.