tsuwm,

Thanks for the OED research. I guess there are too many legal un- formations to list in the Scrabble dictionary.

Thanks again.

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...the OED reveals that uncasual was used at least once in the dimly viewed past, with an olde spelling:

1618 SYLVESTER Panaretus 781 Besides th' off-cutting of All Passages,..Is even to conquer by uncasuall course.