Lunch is related to Noon. Noon is related to Hour. Hour is related to Rush. Rush is related to Order. 
Drop is a type of Drug. Drug is related to High. Height is etymologically related to High. Height is related to Slope. 
Lunch <--RelatedTo--> Noon <--RelatedTo--> Hour <--RelatedTo--> Rush <--RelatedTo--> Order 
Drop --IsA--> Drug <--RelatedTo--> High <--EtymologicallyRelatedTo-- Height <--RelatedTo--> Slope 