"Someplace or another" is a phrase that denotes vagueness and uncertainty. The antonyms of this phrase are specificity and clarity. If you want to be more precise and particular about a location or destination, you can use terms like here, there, this place, that place, or a specific address, city, or country. On the other hand, if you want to convey that you have no clue or interest in a particular location, you can use terms like nowhere, anywhere, everywhere, or not somewhere. By using the right antonyms, you can improve your communication skills and avoid confusion or ambiguity in your conversations or writing.