When searching for other words for inadequate, there are many ideas to consider. The best synonyms for inadequate include insufficient, incomplete, inferior, deficient, and lacking. Other words for inadequate include ineffective, inexact, poor, faulty, and unsatisfactory. Ideas for synonyms for inadequate also include inefficient, incompetent, inaccurate, unacceptable, and inapt. Each of these words can be used to describe something that is not up to par or not meeting expectations. When searching for synonyms for inadequate, it is important to consider the context in which the word is being used in order to choose the best word to convey the intended meaning.