Discuss is a synonym of Discourse. Discourse is a synonym of Lecture. Lecture is related to Professor. Professor is the opposite of Student. 
Sunny is a synonym of Beautiful. Beautiful is a synonym of Clear. Clear is related to Nice. Nice is related to Fellow. 
Discuss <--Synonym--> Discourse <--Synonym--> Lecture <--RelatedTo--> Professor <--Antonym--> Student 
Sunny <--Synonym--> Beautiful <--Synonym--> Clear <--RelatedTo--> Nice <--RelatedTo--> Fellow 