Corporation is related to Big. Big is related to Lot. Lot is a synonym of Bunch. 
Theoretical is the opposite of Actual. Actual is the opposite of Virtual. Virtual is a synonym of Potential. Potential is related to Energy. 
Corporation <--RelatedTo--> Big <--RelatedTo--> Lot <--Synonym--> Bunch 
Theoretical <--Antonym--> Actual <--Antonym--> Virtual <--Synonym--> Potential <--RelatedTo--> Energy 