Suitable is a synonym of Able. Able is a synonym of Good. Good is related to Fair. 
Loop is related to Course. Course is related to Running. Running is a type of Administration. Administration is a type of Medication. 
Suitable <--Synonym--> Able <--Synonym--> Good <--RelatedTo--> Fair 
Loop <--RelatedTo--> Course <--RelatedTo--> Running --IsA--> Administration --IsA--> Medication 