Action words, also known as verbs, are words that describe an action, state, or occurrence. They are used to express an action, a thought, or an emotion. Examples of action words include run, jump, eat, think, and feel. Verbs are the most important part of a sentence and they are used to express an action, an occurrence, or a state of being. Verbs can be used in the present, past, and future tenses. Verbs are essential for constructing meaningful sentences and conveying information.