Invent is a synonym of Form. Bunch is a type of Form. Bunch is related to Word. Word is related to Writing. 
Pray is related to Action. Action is related to Storm. Storm is related to Invention. 
Invent <--Synonym--> Form <--IsA-- Bunch <--RelatedTo--> Word <--RelatedTo--> Writing 
Pray <--RelatedTo--> Action <--RelatedTo--> Storm <--RelatedTo--> Invention 