The antonyms for "de-signed" are numerous, and they vary depending on the context. To "de-sign" means to erase, remove, or cancel a design or plan. Therefore, the opposite of "de-signed" would be to create or develop a design, plan, or strategy. Other antonyms for "de-signed" could include "established," "initiated," "set up," "started," or "launched." In contrast, synonyms for "de-signed" include "abolish," "invalidate," "revoke," "nullify," and "annul." It is important to use the proper antonym when discussing design and planning to avoid confusion with the intended meaning.