The top of the outerwear list gave, to me, quite horrible suggestions. Looking at the very bottom of the list though, provided much better suggestions such as AtlasPeakOuterwear or OpenPlanOuterwear (no limits with open plan).
The way Lean Domain Search works is that it pairs your search term (like outerwear with other keywords commonly found in domain names. Because the results are sorted by how popular the keyword is, the domain names at the top are names you'd often associate with websites such as GoOuterwear, WebOuterwear, etc. As you move farther down the list you get to keywords that are more often used to name small businesses instead of websites.
That would explain why I thought most of the early words were too common and not unique enough.