Girlfriend is a different concept from Buddy. Buddy is a synonym of Mate. Mate is a type of Officer. 
Conscience is related to Inner. Inner is the opposite of Outer. Outer is related to Space. you are likely to find Star in/at/on Space. 
Girlfriend <--DistinctFrom--> Buddy <--Synonym--> Mate --IsA--> Officer 
Conscience <--RelatedTo--> Inner <--Antonym--> Outer <--RelatedTo--> Space <--AtLocation-- Star 