Buy is related to Operation. Operation is related to Board. Board is related to Material. 
Diverse is a synonym of Various. Various is related to Paint. Paint is related to Wall. Wall is part of Structure. 
Buy <--RelatedTo--> Operation <--RelatedTo--> Board <--RelatedTo--> Material 
Diverse <--Synonym--> Various <--RelatedTo--> Paint <--RelatedTo--> Wall --PartOf--> Structure 