back·date 
(băkdāt′)
(băkdāt′)tr.v. back·dat·ed, back·dat·ing, back·dates
To mark or supply with a date that is earlier than the actual date: backdate a check.
- actionable
- actionably
- action figure
- actionless
- action painter
- action painting
- action potential
- Actium
- activate
- activated charcoal
- activation
- activation analysis
- activator
- active
- active galactic nucleus
- active galaxy
- active immunity
- actively
- active-matrix
- activeness
- active recreation
- active site
- active transport
- activewear
- activin