boon
noun
°A blessing or benefit.
"Finding the dry cave was a boon to the weary travellers."
°(archaic) that which is asked or granted as a benefit or favor; a gift; a benefaction; a grant; a present.
"Every good gift and every perfect boon is from above — James I. 17"
adjective
°(obsolete) good; prosperous; as, "boon voyage".
°kind; bountiful; benign.
synonyms: blessing, benefit