Synonyms of 'boon'
something extremely useful, helpful, or beneficialThis battery booster is a boon for photographers.
2 (noun) (archaic) She begged him to grant her one boon.
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in the sense of advantage
benefit or profit
A good crowd will be a definite advantage to the team.
in the sense of benefaction
the donation or help given
Thesaurus for boon from the Collins English Thesaurus