back-scratchingˈback-ˌscratching noun [uncountable] 
the act of doing nice things for someone in order to get something in return
the act of doing nice things for someone in order to get something in return- supply-side economics
- supply teacher
- support
- supporter
- support group
- supporting
- supportive
- suppose
- supposed
- supposedly
- supposition
- suppository
- suppress
- suppressant
- suppressible
- suppression
- supranational
- supremacist
- supremacy
- supreme
- Supreme Being
- Supreme Court
- Supreme Court Justice
- supremely
- supremo