Debate is a synonym of Contend. Contend is a synonym of Cope. Cope is a synonym of Handle. Handle is related to Side. 
Speech is related to Song. Song is a type of Sound. Sound is a type of Announce. 
Debate <--Synonym--> Contend <--Synonym--> Cope <--Synonym--> Handle <--RelatedTo--> Side 
Speech <--RelatedTo--> Song --IsA--> Sound --IsA--> Announce 