Ethics is a synonym of Moral. Moral is the opposite of Ugly. Ugly is a different concept from Beautiful. 
Radar is related to Bat. Bat is related to Cave. Cave is related to Opening. Opening is a type of Motion. 
Ethics <--Synonym--> Moral <--Antonym--> Ugly <--DistinctFrom--> Beautiful 
Radar <--RelatedTo--> Bat <--RelatedTo--> Cave <--RelatedTo--> Opening --IsA--> Motion 