Profound is a synonym of Deep. Deep is a synonym of Great. Great is similar to Extraordinary. Extraordinary is similar to Tremendous. 
Double is related to Vision. Vision is related to Reflection. you are likely to find Reflection in/at/on Mirror. 
Profound <--Synonym--> Deep <--Synonym--> Great <--SimilarTo--> Extraordinary <--SimilarTo--> Tremendous 
Double <--RelatedTo--> Vision <--RelatedTo--> Reflection --AtLocation--> Mirror 