Language
Part of speech: noun
Definition: A form of communication using words either spoken or gestured with the hands and structured with grammar, often with a writing system. The ability to communicate using words. Nonverbal communication. A computer language. The vocabulary and usage used in a particular specialist field. The particular words used in speech or a passage of text. Profanity.
Example sentence: I can't relate to lazy people. We don't speak the same language. I don't understand you. I don't want to understand you.
Terminology
Part of speech: noun
Definition: The doctrine of terms; a theory of terms or appellations; a treatise on terms, a system of specialized terms.The set of terms actually used in any business, art, science, or the like; nomenclature; technical terms; as, the terminology of chemistry.
Example sentence: I'm always a little bit cautious around invented terminology because so much science fiction is off-putting to the uninitiated. You open up the first page, and it's full of all these made-up words.