Button is a type of Add. Add is a synonym of Unite. Unite is a synonym of Compound. Compound is a synonym of Mixture. 
Lecture is a type of Teaching. Lecture is related to Professor. Professor is related to University. University is related to Course. 
Button --IsA--> Add <--Synonym--> Unite <--Synonym--> Compound <--Synonym--> Mixture 
Teaching <--IsA-- Lecture <--RelatedTo--> Professor <--RelatedTo--> University <--RelatedTo--> Course 