Master is related to Ceremony. Circumstance is a type of Ceremony. Circumstance is related to Happen. 
Virtual is a synonym of Potential. Potential is the opposite of Matter. Matter is related to Bone. 
Master <--RelatedTo--> Ceremony <--IsA-- Circumstance <--RelatedTo--> Happen 
Virtual <--Synonym--> Potential <--Antonym--> Matter <--RelatedTo--> Bone 