Clear is a type of Vanish. Clear is a synonym of Top. Top is related to Dress. Dress is related to Style. 
Wait is related to Delay. Extension is a type of Delay. Extension is a synonym of Reference. Reference is related to Drop. 
Vanish <--IsA-- Clear <--Synonym--> Top <--RelatedTo--> Dress <--RelatedTo--> Style 
Wait <--RelatedTo--> Delay <--IsA-- Extension <--Synonym--> Reference <--RelatedTo--> Drop 