Tea is related to Equivalent. Equivalent is a synonym of Counterpart. Counterpart is a synonym of Twin. Twin is a type of Sibling. 
Envelope is related to White. White is related to Christmas. 
Tea <--RelatedTo--> Equivalent <--Synonym--> Counterpart <--Synonym--> Twin --IsA--> Sibling 
Envelope <--RelatedTo--> White <--RelatedTo--> Christmas 