Damage is a type of Casualty. Casual is derived from Casualty. Casual is a synonym of Occasional. 
Specialist is similar to Expert. Experience is etymologically related to Expert. Experience is a type of Content. Content is related to Glad. 
Damage --IsA--> Casualty <--DerivedFrom-- Casual <--Synonym--> Occasional 
Specialist <--SimilarTo--> Expert <--EtymologicallyRelatedTo-- Experience --IsA--> Content <--RelatedTo--> Glad 