Doctor is related to Medical. Medical is related to Health. Health is related to Welfare. Welfare is related to Assistance. 
Fur is related to Soft. Soft is a synonym of Quiet. 
Doctor <--RelatedTo--> Medical <--RelatedTo--> Health <--RelatedTo--> Welfare <--RelatedTo--> Assistance 
Fur <--RelatedTo--> Soft <--Synonym--> Quiet 