Unique is the opposite of Copy. Copy is related to Multiple. Multiple is related to Word. Word is related to Bunch. 
Use is related to Cotton. Cotton is related to White. White is related to Cow. Cow is related to Animal. 
Unique <--Antonym--> Copy <--RelatedTo--> Multiple <--RelatedTo--> Word <--RelatedTo--> Bunch 
Use <--RelatedTo--> Cotton <--RelatedTo--> White <--RelatedTo--> Cow <--RelatedTo--> Animal 