Ugh misspoke at work

I messed up at work.

I said refunded in stead of reimbursed in an email and confused someone.

I mean it wasn’t a big deal I just misspoke. When dealing with someone’s account.

Is that something I can get fired for? I am new to this job and just learning. Also my job isn’t in finance I just have to communicate with them from time to time for accounts and what not