However, there are a few related words and phrases you might be thinking of:
* Brawniness: This is the adjective form of "brawn," meaning "having strong muscles."
* Brawned: This is a verb meaning "to make muscular."
* Brains and brawn: This idiom refers to having both intelligence and physical strength.
* The brawn: This phrase can be used to refer to a strong person or group of people, often in contrast to someone or something that is more intelligent or skillful.
It's important to note that "brawn" is not a common word used in everyday language. It's more often found in literature and formal writing.
Let me know if you had a specific usage or context in mind and I can help you find the right word or phrase.