Grandparent is a type of Animal. Animal is a synonym of Monster. Monster is a synonym of Devil. 
Route is related to Rural. Rural is related to Environment. Environment is related to Weather. Weather is related to Term. 
Grandparent --IsA--> Animal <--Synonym--> Monster <--Synonym--> Devil 
Route <--RelatedTo--> Rural <--RelatedTo--> Environment <--RelatedTo--> Weather <--RelatedTo--> Term 