profusion
noun /prəˈfjuːʒn/
  /prəˈfjuːʒn/
[singular + singular or plural verb, uncountable] (formal or literary)- a very large quantity of something大量;众多 - a profusion of colours色彩斑斓 
-  in profusion Roses grew in profusion against the old wall.老旧墙边遍生玫瑰。 
 词源mid 16th cent.: via French from Latin profusio(n-), from profundere ‘pour out’. Early use expressed the senses ‘extravagance’, ‘squandering’, and ‘waste’.
- a profusion of colours