Tremendous is the opposite of Minute. Minute is related to Unit. Unit is related to Century. Century is related to Number. 
Buy is related to Deal. Deal is related to Partnership. 
Tremendous <--Antonym--> Minute <--RelatedTo--> Unit <--RelatedTo--> Century <--RelatedTo--> Number 
Buy <--RelatedTo--> Deal <--RelatedTo--> Partnership 