Slope is related to Physics. Physics is related to Theory. Law is part of Theory. 
Nest is related to Leave. Leave is the opposite of Arrive. Arrive is related to Coming. Coming is related to Enter. 
Slope <--RelatedTo--> Physics <--RelatedTo--> Theory <--PartOf-- Law 
Nest <--RelatedTo--> Leave <--Antonym--> Arrive <--RelatedTo--> Coming <--RelatedTo--> Enter 