Unit is related to Word. Earth is a type of Word. Earth is related to Solar. 
Allow is related to Access. Access is a type of Right. Right is similar to Extraordinary. Extraordinary is similar to Remarkable. 
Unit <--RelatedTo--> Word <--IsA-- Earth <--RelatedTo--> Solar 
Allow <--RelatedTo--> Access --IsA--> Right <--SimilarTo--> Extraordinary <--SimilarTo--> Remarkable 