Achievement is derived from Achieve. Achievement is related to Great. Great is related to Like. Like is related to Mild. 
Flash is related to Sudden. Sudden is related to Realize. Realize is related to Think. Think is related to Idea. 
Achieve <--DerivedFrom-- Achievement <--RelatedTo--> Great <--RelatedTo--> Like <--RelatedTo--> Mild 
Flash <--RelatedTo--> Sudden <--RelatedTo--> Realize <--RelatedTo--> Think <--RelatedTo--> Idea 