Being in harmony is a state of agreement or synchronization, where everything is at peace and in balance. Synonyms for this concept might include being in sync, being in accord, being in tune, being compatible, being congruent, being aligned, being consistent, or being in concord. These words all convey the idea of things working together smoothly and easily, without unnecessary conflict or discord. Being in harmony can refer to interpersonal relationships, musical performances, or even the natural world, where different elements come together in a seamless and beautiful way. Ultimately, being in harmony is a desirable state that promotes a sense of calm and well-being.