Happen is related to Go. Go is a synonym of Survive. Survive is a synonym of Endure. Endure is a synonym of Persist. 
Favorable is a synonym of Good. Good is related to Merit. Merit is a synonym of Earn. Earn is related to Profit. 
Happen <--RelatedTo--> Go <--Synonym--> Survive <--Synonym--> Endure <--Synonym--> Persist 
Favorable <--Synonym--> Good <--RelatedTo--> Merit <--Synonym--> Earn <--RelatedTo--> Profit 