Invent is a synonym of Discover. Discover is related to Exploration. Exploration is a synonym of Research. Research is related to Experiment. 
Nut is a synonym of Head. Head is a type of Proceed. Do is a type of Proceed. Do is related to Touch. 
Invent <--Synonym--> Discover <--RelatedTo--> Exploration <--Synonym--> Research <--RelatedTo--> Experiment 
Nut <--Synonym--> Head --IsA--> Proceed <--IsA-- Do <--RelatedTo--> Touch 