Section is related to Room. Gallery is a type of Room. 
Proclaim is a synonym of Announce. Cry is a type of Announce. Cry is etymologically related to Greet. Letter can be used for Greet. 
Section <--RelatedTo--> Room <--IsA-- Gallery 
Proclaim <--Synonym--> Announce <--IsA-- Cry --EtymologicallyRelatedTo--> Greet <--UsedFor-- Letter 