Tinea pedi is a fungal infection that affects the feet, most commonly called athlete's foot. The condition is caused by various types of fungi that thrive in warm and moist environments, such as damp socks or shoes. Fortunately, there are several synonyms for tinea pedi that can be used interchangeably, including ringworm of the foot, foot fungus, and dermatophytosis of the foot. These terms are commonly used in medical textbooks and research articles, and they convey the same meaning as tinea pedi. Regardless of which term is used, the key to treating the condition is to keep the feet clean and dry, and to avoid walking barefoot in public places.