The term RELATING TO LANGUAGE can be defined by the 10-letter word 'LINGUISTIC'. Linguistics is the scientific study of language, including its structure, history, and use. It is a field of study that looks at how language works and how it is used in different contexts. It also examines the relationship between language and culture, as well as the development of language over time. Linguistics is an important field of study for understanding how language works and how it is used in communication.