Rear is related to Front. Confront is derived from Front. Confront is a synonym of Face. Face is a type of Appearance. 
Sheep is related to Adult. Character is a type of Adult. 
Rear <--RelatedTo--> Front <--DerivedFrom-- Confront <--Synonym--> Face --IsA--> Appearance 
Sheep <--RelatedTo--> Adult <--IsA-- Character 