- ratchet effect
- ratchet wheel
- rate
- rate card
- rate meter
- rate payer
- rate war
- rate-cap
- rateable
- ratel
- rater
- ratfish
- rath
- rathaus
- rathe
- rather
- rathole
- rathskeller
- raticide
- ratification
- ratifier
- ratify
- ratine
- rating
- ratio
- ratiocinate
- ratiocination
- ratiocinative
- ration
- ration book
- ration export
- ration system
- ration-bread
- rational
- rational analysis
- rational expression
- rationale
- rationalism
- rationalistic
- rationality
- rationalization
- rationalize
- rationing
- ratite
- ratlins
- rato
- rato unit
- ratoon
- rats
- ratsbane
臉書專頁