Compare is a type of Study. Comparison is derived from Compare. Contrast is a type of Comparison. Contrast is a type of Opposition. 
Empire is related to Entity. Entity is related to Cell. Cell is related to Tiny. 
Study <--IsA-- Compare <--DerivedFrom-- Comparison <--IsA-- Contrast --IsA--> Opposition 
Empire <--RelatedTo--> Entity <--RelatedTo--> Cell <--RelatedTo--> Tiny 