Dignity is a type of Status. Status is a type of State. State is related to Mind. Mind is a synonym of Reason. 
Thick is the opposite of Slight. Slight is a synonym of Little. Little is related to Rabbit. 
Dignity --IsA--> Status --IsA--> State <--RelatedTo--> Mind <--Synonym--> Reason 
Thick <--Antonym--> Slight <--Synonym--> Little <--RelatedTo--> Rabbit 