Defense is related to Shell. Shell is related to Have. Have is related to Hand. 
Suffer is a type of Tend. Freeze is a type of Suffer. Freeze is the opposite of Melt. 
Defense <--RelatedTo--> Shell <--RelatedTo--> Have <--RelatedTo--> Hand 
Tend <--IsA-- Suffer <--IsA-- Freeze <--Antonym--> Melt 