Reader is a type of Textbook. Reader is the opposite of Writer. 
Stove is the opposite of Oven. Oven is related to Cook. Dress is a type of Cook. Dress is related to Activity. 
Textbook <--IsA-- Reader <--Antonym--> Writer 
Stove <--Antonym--> Oven <--RelatedTo--> Cook <--IsA-- Dress <--RelatedTo--> Activity 