Man is related to Grandfather. Grandfather is a type of Grandparent. Grandmother is a type of Grandparent. Grandmother is the opposite of Grandchild. 
Admit is a synonym of Pass. Pass is a synonym of Road. 
Man <--RelatedTo--> Grandfather --IsA--> Grandparent <--IsA-- Grandmother <--Antonym--> Grandchild 
Admit <--Synonym--> Pass <--Synonym--> Road 