Firmfooted is a descriptive word that refers to a person or animal's stability and sure-footedness. If you're looking for synonyms to communicate this idea, you might consider words like stable, steadfast, secure, balanced, confident, or resolute. Other options include terms like assured, composed, unwavering, grounded, decisive, or unshakable. Each of these synonyms communicates a sense of confidence and reliability that is associated with being firmfooted. Whether you're describing an athlete's ability to maintain balance or a leader's steady resilience, these words can help capture the essence of what it means to be securely rooted and firmly planted in one's beliefs.