Grapheme clusters, a.k.a.real characters

[Gregory Ewing]

Marko Rauhamaa wrote:
>> * the final consonant of a single-syllable word is doubled only if the
>>   consonant is "k", "l" or "s" ("kick", "kill", "kiss")
> 
> ... or "f" ("stiff") or "z" ("buzz")

or sometimes "r" ("burr"), or "t" ("butt").

-- 
Greg