Donate is a synonym of Contribute. Contribute is a synonym of Gift. Gift can be Free. Free is a different concept from Costly. 
Fit is related to Health. Health is related to Constitution. Constitution is a type of Beginning. Beginning is the opposite of Conclusion. 
Donate <--Synonym--> Contribute <--Synonym--> Gift --HasProperty--> Free <--DistinctFrom--> Costly 
Fit <--RelatedTo--> Health <--RelatedTo--> Constitution --IsA--> Beginning <--Antonym--> Conclusion 