Synthetic languages are those which use affixes or inflections to convey grammatical information and relationships between words in sentences. Such languages can be described using various synonyms to highlight their unique characteristics. One such synonym is agglutinative languages, where the words are formed by adding multiple morphemes to the root word. Another synonym is fusional or inflectional languages, where the morphemes are fused together into a single word. Polysynthetic languages are also synonyms for synthetic languages, as they allow forming complex sentences by combining many words into a single phrase. Analytic languages, on the other hand, are the opposite of synthetic languages, with little to no inflectional morphology. Overall, the synonyms for synthetic languages capture the complexity and illustriousness of these unique ways of communication.