Communicate is related to Prayer. Prayer is related to Conversation. Conversation is a synonym of Dialogue. Dialogue is a synonym of Negotiation. 
Traveler is derived from Travel. Ski is a type of Travel. Ski is related to Slope. Slope is related to Terrain. 
Communicate <--RelatedTo--> Prayer <--RelatedTo--> Conversation <--Synonym--> Dialogue <--Synonym--> Negotiation 
Traveler --DerivedFrom--> Travel <--IsA-- Ski <--RelatedTo--> Slope <--RelatedTo--> Terrain 