Pine is a synonym of Pant. Pant is a synonym of Pound. Pound is a synonym of Crush. Crush is a type of Crowd. 
Index is a synonym of Teacher. Teacher is a type of Person. 
Pine <--Synonym--> Pant <--Synonym--> Pound <--Synonym--> Crush --IsA--> Crowd 
Index <--Synonym--> Teacher --IsA--> Person 