Common words:
* benefactor: a person who gives money or other help to a person or cause
* beneficial: producing a good or helpful result
* benefit: an advantage or profit gained from something
* benevolent: well-meaning and kindly
* benign: gentle and kindly; not harmful or dangerous
* benighted: in a state of darkness, ignorance, or misfortune
* benison: a blessing
Less common words:
* beneficence: the quality of being kind and generous
* benignant: kindly and gracious
* benefic: doing good
* benevolence: the quality of being well-meaning and kindly
* benediction: a blessing, especially at the end of a religious service
* beneficiary: a person who receives benefits
* beneficently: in a kind and generous way
* beneficent: doing good; generous
Words from other languages:
* benzodiazepine: a type of drug used to treat anxiety and insomnia (from Latin "benzo" and "diazepine")
* benzene: a colorless flammable liquid used as a solvent (from German "Benzol")
Let me know if you want more words or if you have a specific topic or area you're interested in!