Non-complex , (words) of one syllable, absolute, austere, artless, basic, and elementary are synonyms for simple; difficult, hard, demanding, complicated, and complex are antonyms of simple. On this page, you will find 144 another word for simple.
1. straightforward
2. basic
3. plain
4. unpretentious
5. non-compound
The instructions are simple enough.
She gave a simple answer.
Keep the design very simple.
It's a simple but effective solution.