If you are preparing for SSC CGL, CHSL, Bank exams, or state-level competitive tests, you already know how crucial the English section is. Among all vocabulary topics, One Word Substitution (OWS) carries significant weight. Scoring full marks here isn't about memorizing the entire dictionary; it's about mastering the high-frequency words that examiners love to ask. In this guide, we have compiled a carefully curated list of essential One Word Substitutions categorized by themes, along with clear definitions to help you retain them quickly. What is One Word Substitution? One Word Substitution simply means replacing a long sentence or phrase with a single precise word. It makes your writing concise and tests your vocabulary depth. For instance, instead of saying "A person who looks at the bright side of things," you can simply say "Optimist." 1. Words Related to Person & Character Altruist: A person who unselfishly cares for the welfare of...