Deep is related to Cotton. Cotton is related to Pillow. 
Sing is the opposite of Dance. Dance is related to Happy. Happy is similar to Willing. Willing is similar to Ready. 
Deep <--RelatedTo--> Cotton <--RelatedTo--> Pillow 
Sing <--Antonym--> Dance <--RelatedTo--> Happy <--SimilarTo--> Willing <--SimilarTo--> Ready 