Gain is a type of Sum. Sum is the opposite of Difference. Differ is derived from Difference. 
Place is related to General. General is related to Surprise. Surprise is related to Exciting. 
Gain --IsA--> Sum <--Antonym--> Difference <--DerivedFrom-- Differ 
Place <--RelatedTo--> General <--RelatedTo--> Surprise <--RelatedTo--> Exciting 