"Down-to-earth" is a common term used to describe someone who is practical and unpretentious. However, if you're looking for alternative words to use, you might consider "unaffected," "accessible," or "unconventional." Other synonyms include "realistic," "pragmatic," and "grounded." "Genuine," "sincere," and "authentic" all convey a similar meaning. People who are down-to-earth are often described as "humble" and "unassuming." They may be "informal" or "approachable." In short, there are plenty of words that can be used to describe someone who is down-to-earth, each capturing a slightly different aspect of their personality.