Competitor is a synonym of Opponent. Opponent is the opposite of Team. Crew is a type of Team. Crew is related to Staff. 
Deep is a different concept from Shallow. Shallow is related to Water. Water is related to Flood. 
Competitor <--Synonym--> Opponent <--Antonym--> Team <--IsA-- Crew <--RelatedTo--> Staff 
Deep <--DistinctFrom--> Shallow <--RelatedTo--> Water <--RelatedTo--> Flood 