Unlike is the opposite of Similar. Similar is related to Rifle. Rifle is related to Barrel. Barrel is a synonym of Drum. 
Determination is a synonym of Decision. Decision is related to Judge. Judge is related to Related. Related is related to Oil. 
Unlike <--Antonym--> Similar <--RelatedTo--> Rifle <--RelatedTo--> Barrel <--Synonym--> Drum 
Determination <--Synonym--> Decision <--RelatedTo--> Judge <--RelatedTo--> Related <--RelatedTo--> Oil 