Office is related to Firm. Firm is similar to Healthy. Healthy is a different concept from Ill. 
Immigrant is a different concept from Native. Native is related to Local. Local is a different concept from International. International is a synonym of Foreign. 
Office <--RelatedTo--> Firm <--SimilarTo--> Healthy <--DistinctFrom--> Ill 
Immigrant <--DistinctFrom--> Native <--RelatedTo--> Local <--DistinctFrom--> International <--Synonym--> Foreign 