Hey, Geoff! Visit OneLook.com! That site has access to over 700 dictionaries, and almost every word that appears here may be found in one of those. Yes, exceptions to the rule, but rarely.

And to continue: A board on which all have easy access to OneLook.com so that, with quick clicks, all may check out definitions, synonyms, and etymologies of almost every word discussed in posts and PMs, except on days that they're just lazy bums.