Lid is a synonym of Cap. Cap is related to Safety. Safety is a type of Confidence. 
Fierce is related to Shark. Shark is a type of Expert. Technician is a type of Expert. 
Lid <--Synonym--> Cap <--RelatedTo--> Safety --IsA--> Confidence 
Fierce <--RelatedTo--> Shark --IsA--> Expert <--IsA-- Technician 