Extra is a synonym of Additional. Additional is related to Amendment. Amendment is related to Changing. Changing is related to Move. 
Listener is the opposite of Speaker. Speaker is related to Machine. Machine is related to Laundry. you are likely to find Bucket in/at/on Laundry. 
Extra <--Synonym--> Additional <--RelatedTo--> Amendment <--RelatedTo--> Changing <--RelatedTo--> Move 
Listener <--Antonym--> Speaker <--RelatedTo--> Machine <--RelatedTo--> Laundry <--AtLocation-- Bucket 