Employ is the opposite of Sack. Sack is related to Bed. Bed is related to Aid. Aids is a form of Aid. 
Climb is related to Like. Like is related to Count. Count is a type of Classify. 
Employ <--Antonym--> Sack <--RelatedTo--> Bed <--RelatedTo--> Aid <--FormOf-- Aids 
Climb <--RelatedTo--> Like <--RelatedTo--> Count --IsA--> Classify 