Noon is the opposite of Afternoon. Afternoon is related to High. High is related to Bird. Bird is a synonym of Guy. 
Principle is related to Interest. Interest is related to Investment. 
Noon <--Antonym--> Afternoon <--RelatedTo--> High <--RelatedTo--> Bird <--Synonym--> Guy 
Principle <--RelatedTo--> Interest <--RelatedTo--> Investment 