Equal is similar to Close. Close is the opposite of Extend. Extend is related to Expansion. Expansion is the opposite of Reduction. 
Closer is related to Like. Like is related to Due. 
Equal <--SimilarTo--> Close <--Antonym--> Extend <--RelatedTo--> Expansion <--Antonym--> Reduction 
Closer <--RelatedTo--> Like <--RelatedTo--> Due 