So question, is there anyway for me to change the realm name, I misclicked when doing it and hit enter instead, I kinda wanted to name the realm Lacirithia.
"Barad Lacarith" is a typo for "Lacirithia"?
...Anyway, there is no in-game mechanism for changing the name of a realm. Tom has dome realm name changes in the past, but only with very good reason—support by RP, etc.
I'm not sure whether "I didn't proofread the realm name I entered before clicking submit" qualifies or not. Particularly in an instance like this, where the name you ended up with isn't some obvious wrong name, like "Lacirith Flieds".