However, you can use prefixes to create words with similar meanings, depending on the nuance you want:
* "Over-": This suggests making something more complex than it needs to be. (e.g., overcomplicate)
* "In-": This can be used to mean "to make something difficult or confused." (e.g., incomplicate - while this is not a standard word, it could be used creatively.)
* "Re-": You could use this to imply making something more complex again, after it had been simplified. (e.g., recomPLICATE, although this is not a standard word.)
Important Note: "Complicate" itself is a verb. You wouldn't typically use a prefix to make it a noun or an adjective.
For noun forms, you could use "complexity" or "complication." For an adjective form, you could use "complicated."