Grapefruits are a citrus fruit that are known for their tangy and sweet flavor. However, if you're tired of using the word "grapefruit" over and over again, there are numerous synonyms you can use to add variety to your writing or conversation. Some possible alternatives include pomelo, which is a similar fruit that is slightly sweeter than grapefruit, as well as the less common Ugli fruit, which is a hybrid of grapefruit, orange, and tangerine. You could also use the term citrus fruit more broadly, or opt for specific varieties of grapefruit like the pink or ruby red varieties. With so many options, there's no need to repeat the same word again and again.