Waste is the opposite of Gain. Gain is related to Benefit. Benefit is related to Bonus. Bonus is a synonym of Incentive. 
Desk is related to Place. Place is related to File. File can be used for Shape. Shape is a synonym of Work. 
Waste <--Antonym--> Gain <--RelatedTo--> Benefit <--RelatedTo--> Bonus <--Synonym--> Incentive 
Desk <--RelatedTo--> Place <--RelatedTo--> File --UsedFor--> Shape <--Synonym--> Work 