Delay, add-on, amplification, continuation, and deferral are all synonyms for extension. Retrogression and regression are these antonyms of extension. And here are another 44 synonyms for extension.
Extension Synonyms
1. addition
- Add-on
- Addendum
- Addition
- Adjunct
- Annexe
- Appendage
- Appendix
- Augmentation
- Supplement
- Supplementary building
- Wing
- Ell
2. expansion
- Amplification
- Augmentation
- Broadening
- Continuation
- Deepening
- Development
- Diversification
- Elongation
- Enhancement
- Enlargement
- Expansion
- Growth
- Heightening
- Increase
- Lengthening
- Stretching
- Widening
- Drawing out
3. prolongation
- Continuation
- Deferral
- Delay
- Increase
- Increased time
- Lengthening
- Longer period
- More/extra time
- Perpetuation
- Postponement
- Prolongation
- Protraction
- Additional time