Moment is related to Chance. Chance is the opposite of Sure. 
Fly is related to Household. Household is related to Dog. Dog is a different concept from Cut. Cut is related to Tax. 
Moment <--RelatedTo--> Chance <--Antonym--> Sure 
Fly <--RelatedTo--> Household <--RelatedTo--> Dog <--DistinctFrom--> Cut <--RelatedTo--> Tax 