Smell is related to Awful. Awful is the opposite of Excellent. Excellent is the opposite of Horrible. 
Remarkable is a synonym of Strange. Strange is the opposite of Usual. Usual is related to Description. Description is related to Century. 
Smell <--RelatedTo--> Awful <--Antonym--> Excellent <--Antonym--> Horrible 
Remarkable <--Synonym--> Strange <--Antonym--> Usual <--RelatedTo--> Description <--RelatedTo--> Century 