Mushroom is a synonym of Rise. Rise is related to Present. Present is related to Eat. 
Galaxy is related to Formation. Formation is a synonym of Consist. Consist is a synonym of Comprise. 
Mushroom <--Synonym--> Rise <--RelatedTo--> Present <--RelatedTo--> Eat 
Galaxy <--RelatedTo--> Formation <--Synonym--> Consist <--Synonym--> Comprise 