Monomorphemic refers to words that cannot be further divided into smaller units with meaning. Some common synonyms for monomorphemic are simple, indivisible, unanalyzable, and uninflected. Other synonyms include atomic, basic, elemental, and primary. These words all convey the same meaning of a single, indivisible unit. In linguistics, monomorphemic words are often contrasted with polymorphemic words, which are composed of multiple meaningful units. Some common examples of monomorphemic words include "cat," "bus," and "run," which cannot be further broken down into smaller units with individual meanings. Understanding the concept of monomorphemic words is essential for understanding the structure and function of language.