Academic is a type of Researcher. Academic is related to Theory. Theory is related to Big. Big is a different concept from Little. 
Straight is a synonym of Consecutive. Consecutive is similar to Continuous. Continuous is derived from Continue. 
Researcher <--IsA-- Academic <--RelatedTo--> Theory <--RelatedTo--> Big <--DistinctFrom--> Little 
Straight <--Synonym--> Consecutive <--SimilarTo--> Continuous --DerivedFrom--> Continue 