best man 
noun
A male friend or relative chosen by a bridegroom to assist him at his wedding.My best man at my wedding was my brother, but my other attendants were two groomsmaids....
- One evening as I awaited trial, my brother asked me to be the best man at his wedding.
- They had been close and Harold had been his best man at his wedding in 1942, a year after joining the RAF.
- reproachless
- reproachment
- reprobable
- reprobacy
- reprobate
- reprobateness
- reprobater
- reprobation
- reprobationary
- reprobative
- reprobator
- reprobatory
- reprobe
- reprocess
- reproclaim
- reproclamation
- reprocure
- reproduce
- reproduceable
- reproducer
- reproducibility
- reproducible
- reproducibly
- reproduction
- reproduction factor