Sick is related to Cold. Cold is related to Rain. Rain is related to Outside. Outside is similar to Outer. 
Enroll is a synonym of Note. Note is related to Component. 
Sick <--RelatedTo--> Cold <--RelatedTo--> Rain <--RelatedTo--> Outside <--SimilarTo--> Outer 
Enroll <--Synonym--> Note <--RelatedTo--> Component 