* रचना (rachana): This is a general word for creation or design, and is suitable for artistic design, architectural design, or even the design of a plan.
* डिज़ाइन (dizain): This is the transliterated English word, and is widely understood.
* रुपरेखा (ruprekha): This refers more specifically to an outline, sketch, or framework of a design.
* नक्शा (naksha): This means "map" or "plan," and is appropriate when referring to a blueprint or technical design.
* ढाँचा (dhaancha): This translates to "structure" or "framework," and can be used for the underlying design of something.
The best word to use will depend on the specific nuance you want to convey. For most general purposes, रचना (rachana) or डिज़ाइन (dizain) will be understood.