When trying to understand a concept, it is important to identify the fundamental aspects of it. Knowing the synonyms for the word “fundamental” is a great way to ensure that you have a full understanding of the concept. Having a list of the best ideas and other words for “fundamental” can help you gain a better understanding of the concept. Synonyms such as essential, basic, primary, crucial, necessary, key, significant, central, important, and vital are all useful words to understand the concept. Other words such as imperative, indispensable, preeminent, prevalent, essentialist, primary-most, paramount, primitive, underlying, groundwork, initial, ground, basal, backbone, core, origin, basis, root, substratum, and foundation can also be used to further understand the concept.