Don't question your boss

When she sends you an email and uses the word "Gospeller" don't fire off a cocky response asking if that is a word.

Because it is

 gos·pel·er also gos·pel·ler  

n.

1. One who teaches or professes faith in a gospel.

2. One who reads or sings the Gospel as part of a church service.

 

So you are wrong

 

Also this serves as a sign never to play scrabble with her

lesson learned