Originally Posted by Steven Lyle Jordan
If I was writing a comic book, I'd be concerned about how to spell a scream. For a novel, I'd just write "He/she screamed," maybe add a bit of detail about what kind of scream (pained, frightened, panicked, etc) and don't worry about the spelling.
There are some authors who have used the sound of a scream (or a shriek, as is the case with my example) to great effect. L.E. Modesitt Jr. is one of them.