Synthetic grammar is a linguistic approach used to describe the inflectional system of a language. There are many synonyms that describe the same concept, including fusional grammar, agglutinative grammar, and inflectional grammar. In fusional grammar, a single affix represents multiple grammatical categories, while in agglutinative grammar, each affix represents a single grammatical category. Inflectional grammar, on the other hand, refers to the way a language changes the form of words to express particular meanings, such as tense, gender, and case. Other synonyms for synthetic grammar include non-analytic grammar, synthetic language, and a polysynthetic language. Regardless of the term used, all describe a complex system of grammatical inflection employed by many languages around the world.