Small is the opposite of Middle. Middle is related to Peace. Peace is related to Associated. 
Terrorist is a type of Radical. Radical is a synonym of Group. Group is related to Youth. Youth is a synonym of Teen. 
Small <--Antonym--> Middle <--RelatedTo--> Peace <--RelatedTo--> Associated 
Terrorist --IsA--> Radical <--Synonym--> Group <--RelatedTo--> Youth <--Synonym--> Teen 