Mike --
When you first mentioned the two words I thought that's what you were referring to but then I thought "maybe he has some different words...".
Of course it's hard to express how to use different inflections with them but they work. I've been using them in customer support and other emails for a while now. Something like "How about....... Fair enough?" And they work well. Puts a closure on the thought.
Have a good one!
-- Dan Butler
How many uses will you find?