Deep is a synonym of Late. Late is a synonym of Previous. 
Tail is the opposite of Toe. Toe is related to Limb. Limb is related to Bone. Bone is related to Surround. 
Deep <--Synonym--> Late <--Synonym--> Previous 
Tail <--Antonym--> Toe <--RelatedTo--> Limb <--RelatedTo--> Bone <--RelatedTo--> Surround 