If you're looking for synonyms for the word "lukewarm," there are plenty of options to choose from. Some other terms that can be used to describe something that is neither hot nor cold include tepid, lukewarmish, mildly warm, or moderately heated. Other options might include room temperature, neutral, or even noncommittal. Whether you're trying to describe the temperature of a beverage, the attitude of a person, or the quality of an idea, these alternatives can help add some variety and nuance to your vocabulary. So why settle for just one word when there are so many others to choose from?