Vast is a synonym of Great. Great is related to Nature. Nature is a type of Universe. Universe is similar to Reality. 
Figure is related to Father. Grandfather is derived from Father. Grandfather is related to Retirement. 
Vast <--Synonym--> Great <--RelatedTo--> Nature --IsA--> Universe <--SimilarTo--> Reality 
Figure <--RelatedTo--> Father <--DerivedFrom-- Grandfather <--RelatedTo--> Retirement 