The word "un-practical" suggests something that is not logical or not feasible for practical purposes. Antonyms for this word include words such as practical, feasible, sensible, logical, reasonable, and pragmatic. If something is practical, it means that it is useful and achievable in the real world. Feasible is another antonym that means something is possible to achieve. Sensible and logical are also good antonyms that suggest something is reasonable and logical. Reasonable means that something is based on sound judgment, and pragmatic means that something is practical and realistic. Overall, if something is not un-practical, it is likely to be practical, feasible, sensible, logical, reasonable, or pragmatic.