When we say that someone or something is alive, it means that they are living and have the capacity to grow, reproduce and respond to stimuli. Synonyms for the word alive include thriving, existing, animated, pulsating, vibrant, and active. Thriving is used to describe something that is healthy, prosperous, and successful. Existing implies that something simply is, while vibrant connotes liveliness and energy. Pulsating suggests a rhythmic and pulsing vitality, while animated implies movement and liveliness. Active suggests a state of being constantly engaged in action. All of these words capture the essence of being alive and convey a sense of vitality, energy, and liveliness.