Stem is related to Vertical. Vertical is a synonym of Pipe. Pipe is related to Mouth. Mouth is related to Spit. 
March is a type of Progress. March is a synonym of Parade. 
Stem <--RelatedTo--> Vertical <--Synonym--> Pipe <--RelatedTo--> Mouth <--RelatedTo--> Spit 
Progress <--IsA-- March <--Synonym--> Parade 