The term TYPE OF VB refers to the four types of verb forms: irregular verbs (IRREG, 5 letters), intransitive verbs (INT, 3 letters), irregular verbs (IRR, 3 letters) and intransitive verbs (INTR, 4 letters). Irregular verbs are verbs that do not follow the normal rules of conjugation, while intransitive verbs do not take a direct object. Irregular verbs are usually more common in spoken language, while intransitive verbs are more common in written language.