Teach SFSpeechRecognizer custom words (medication names, chemistry terms, etc)

Hi, I have a question regarding the integration of the speech to text library called SFSpeechRecognizer. I need SFSpeechRecognizer to recognize terms that are not present in the iOS dictionary like medication names, chemistry terms, etc. I would have to add them, somehow, for SFSpeechRecognizer to be able to recognise them. Is this possible? Thanks