boon[noun]Synonyms: benefit, advantage, blessing, favour, gift, godsend, manna from heaven, windfall 
 [TahlilGaran] English Synonym Dictionary ▲
 boon /buːn/ 
 noun [countable usually singular][
Date: 1100-1200; 
Language: Old Norse; 
Origin:  'prayer, request']
 something that is very useful and makes your life a lot easier or better: 
 The bus service is a real boon to people in the village.
 The bus service is a real boon to people in the village.  [TahlilGaran] Dictionary of Contemporary English ▲