Honey is a boon to those with weak digestion.
I have one more boon to claim from you, he whispered.
It is an unspeakable boon to me to be able to speak in winged words that need no interpretation.
Movie stardom can be a big boon, for example.
Batter Blaster is a boon for dads who are short on time, but have hungry kids at the table on a Saturday morning.