Edge is a synonym of Rim. Beard is a type of Rim. Beard is related to Face. Eyebrow is part of Face. 
Invitation is related to Wedding. Wedding is related to Lifetime. 
Edge <--Synonym--> Rim <--IsA-- Beard <--RelatedTo--> Face <--PartOf-- Eyebrow 
Invitation <--RelatedTo--> Wedding <--RelatedTo--> Lifetime 