benediction
a good blessing in a religious service
benefactor
a good person who offers help or donates money
beneficial
having a good outcome; favorable
beneficiary
a person who receives something good from someone else such as an inheritance
benefit
to gain or receive good results from something
benevolent
kind; good-hearted
benign
favorable; having a good effect; not harmful
bonafide
in good faith; authentic; genuine; real
bonus
anything good that is received over and beyond what was expected (usually money)
bon voyage
French for "have a good trip
ben, bene, bon
good or well