Vertical is a synonym of Pipe. Pipe is a synonym of Gun. Gun is related to Loud. Loud is a synonym of Strong. 
Proposal is related to Plan. Plan is related to Procedure. Procedure is a synonym of Function. Function is related to Hear. 
Vertical <--Synonym--> Pipe <--Synonym--> Gun <--RelatedTo--> Loud <--Synonym--> Strong 
Proposal <--RelatedTo--> Plan <--RelatedTo--> Procedure <--Synonym--> Function <--RelatedTo--> Hear 