Station is a synonym of Post. Post is a type of Announce. Announce is related to Announcement. 
View is related to Show. Define is a type of Show. Define is related to Explain. Explain is related to Discuss. 
Station <--Synonym--> Post --IsA--> Announce <--RelatedTo--> Announcement 
View <--RelatedTo--> Show <--IsA-- Define <--RelatedTo--> Explain <--RelatedTo--> Discuss 