Crucial is related to Essential. Essential is related to Oil. Oil is related to Price. Price is related to Consumer. 
Bright is a synonym of Deep. Deep is similar to Intense. Intensity is derived from Intense. 
Crucial <--RelatedTo--> Essential <--RelatedTo--> Oil <--RelatedTo--> Price <--RelatedTo--> Consumer 
Bright <--Synonym--> Deep <--SimilarTo--> Intense <--DerivedFrom-- Intensity 