Teaching words to dictation

I have a medical condition that is hard to pronounce and is not in the dictation dictionary. It also limits my ability to type and so I can’t type with ease and rely upon dictation for communication (for example this is all dictated). I would like to teach the name of my condition to my phone because it is something I use in communication a great deal but the phone can’t seem to get it correct. Is there any way to teach a new word to dictation?