Assuage , banal, colourless, bleak, faint, blunt, apathetic, boneheaded, allay, and alleviate are synonyms for dull; sunny and bright are antonyms of dull. On this page, you will find 227 another word for dull.
1. uninteresting
2. drab
3. overcast
4. muffled
5. blunt
6. slack
7. unintelligent
8. lessen
The knife blade is dull now.
The movie was incredibly dull.
His speech was long and dull.
The color seemed too dull today.