The phrase "inch along" typically describes slow and gradual progress, usually in a physical sense. Antonyms, or words that have the opposite meaning, might include "sprint," "race," or "hurry." These words suggest quick and efficient movement, rather than slow and steady progress. Other antonyms might include "leap," "jump," or "bound," which all suggest a sudden burst of movement. Alternatively, antonyms could include words like "retreat," "backtrack," or "recede," which indicate moving away from a starting point rather than towards a destination. While there are many potential antonyms for "inch along," the most appropriate will depend on the context in which the phrase is being used.