Payment is related to Give. Give is a type of Execute. Execute is a type of Enforce. Enforce is a synonym of Impose. 
Lecture is a synonym of Speech. Speech is related to Dialogue. Dialogue is a synonym of Conversation. Conversation is related to Say. 
Payment <--RelatedTo--> Give --IsA--> Execute --IsA--> Enforce <--Synonym--> Impose 
Lecture <--Synonym--> Speech <--RelatedTo--> Dialogue <--Synonym--> Conversation <--RelatedTo--> Say 