- (n,vs,adj-no) circulation
 rotation
 cycle
 (P)
 
- (n) vicious circle
 (P)
 
- (n) recycle 
- (n) circulatory organ
 (P)
 
- (n) circulatory system (blood, lymph, etc.) 
- (n) cyclicity 
- (n) loop line
 belt line
 
- (n) business cycle 
- (n,adj-no) blood circulation 
- (n) inventory cycle 
- (n) cardiology 
- (n) circulatory system (blood, lymph, etc.) 
- (n) (comp) end-around borrow 
- (n) round-trip transaction
 round-tripping
 
- (n) recurring decimal 
- (n) circular reasoning 
- (n) (comp) counter-rotating 
- (n) carbon cycle 
- (n) nitrogen cycle 
- (n) thermohaline circulation 
- (adj-na) acyclic 
- (n) (material) recycling society
 recycling-oriented society
 
- (n) (comp) end-around carry 
- (n) (comp) end-around shift
 cyclic shift
 
- (n) Kuznets cycle 
- (n) left ventricular assist device
 LVAD
 
- (n) Act for Establishing a Recycling-Oriented Society