When using Rubymine, you will invariably reach the point where it starts complaining that a word that makes sense to you is considered a typo by Rubymine and highlighted as a warning. I normally try to keep these clean if I can.

The “fix” is simple. It just needs to be added to the dictionary. Go through File > Settings > Editor > Spelling and add the words to the dictionary. I prefer to save it to the project-specific dictionary. Once you do this, the warnings disappear!