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