Explore is a type of Investigate. Pioneer is a type of Explore. 
Interrupt is the opposite of Continue. Continue is related to Ongoing. Ongoing is a synonym of Continuous. Continuous is similar to Consecutive. 
Investigate <--IsA-- Explore <--IsA-- Pioneer 
Interrupt <--Antonym--> Continue <--RelatedTo--> Ongoing <--Synonym--> Continuous <--SimilarTo--> Consecutive 