The phrase "with both feet on the ground" implies being practical, grounded, and level-headed. Some synonyms for this phrase include being realistic, rational, sensible, and pragmatic. It can also mean having a practical approach, being down-to-earth, having a level-headed demeanor, and being practical-minded. These synonyms are often used to describe someone who is practical in their outlook towards life and makes wise decisions. These individuals are not easily swayed by emotions and have a strong sense of reality. Overall, these synonyms describe someone who is not afraid to face challenges head-on and tackles them in a practical, constructive way.