elvish tattoo.

[elwin starfyre]

hello all.
i'm new. i used to frequent this site a few years ago, and just recently my obsession with LOTR returned and i decided to join this site.

anywhoooo.

i want to get the word "rebellion" in elvish characters tattooed on myself...
however i cannot find a translation in any of Tolkien's elvish dialects for the word.
and that's fine, i'll settle for english. [though if anyone knows the translation that would be sweet.]

and i am a little confused about how to use tengwar to spell out the english form.
for example: which version of "r" would i use? the one that looks like a "y" or the one that looks like an "n"?
are there any rules regarding repeated letters, such as "ll"?
and the like.
if anyone could give me some basic guidelines, that would be great, and if anyone has answers for those two questions, that would be even better, as they are the two biggest problems i have run into.