Become is a synonym of Fall. Fall is related to Evening. Evening is a type of Day. 
Bow is related to Partner. Partner is related to Business. Business is the opposite of Nonprofit. 
Become <--Synonym--> Fall <--RelatedTo--> Evening --IsA--> Day 
Bow <--RelatedTo--> Partner <--RelatedTo--> Business <--Antonym--> Nonprofit 