This document discusses different types of sense relations between words. It defines hyponymy as a hierarchical relationship where one word is a type of another (e.g. dog is a hyponym of animal). Synonymy refers to words that have the same meaning but different sounds (e.g. buy and purchase). Antonymy describes words with opposite meanings, including graded antonyms that can be divided into degrees (e.g. hot and very hot) and complementary antonyms where one negates the other (e.g. alive and dead). Other relations covered include homonymy, homophony, homography, polysemy, and meronymy.