Couch is a synonym of Explain. Explain is a synonym of Excuse. Excuse is a synonym of Apologize. 
Valley is a type of Stadium. Stadium is related to Band. Band is related to Loud. 
Couch <--Synonym--> Explain <--Synonym--> Excuse <--Synonym--> Apologize 
Valley --IsA--> Stadium <--RelatedTo--> Band <--RelatedTo--> Loud 