Skin is related to Protection. Army can be used for Protection. Army is related to Defense. Defense is the opposite of Offense. 
Hate would make you want to Kill. Hate is the opposite of Like. 
Skin <--RelatedTo--> Protection <--UsedFor-- Army <--RelatedTo--> Defense <--Antonym--> Offense 
Kill <--CausesDesire-- Hate <--Antonym--> Like 