The antonyms for the word "most oceangoing" can vary based on the context of the term. If the word is being used to describe a vessel or ship, the antonyms could be "landlocked," "coastal," or "riverine." However, if the word is used to describe an adventurous spirit, the antonyms could be "homebody," "indoor," or "sedentary." In terms of travel or mobility, the antonyms could be "immobile," "stationary," or "grounded." Ultimately, the antonyms for "most oceangoing" will depend on the subject matter and the intended meaning behind the word.