boon companion
/ˌbuːn kəmˈpanjən
/noun
A close friend with whom one enjoys spending time: Sid was a boon companion to women...
- That I was sad when it was over - aggrieved that my boon companion of a full month would no longer startle, amaze, entertain or edify me.
- Donovan, our driver-guide, turned out to be a boon companion.
- The ‘optimists’ viewed modern economic growth and its boon companion, industrialization, as unambiguously good - led as they were by good things like the market.
Origin
Mid 16th century: boon from Old French bon, from Latin bonus 'good'. The early literal sense was 'good fellow', originally denoting a drinking companion.