Immigrant is a different concept from Native. Native is the opposite of Alien. Alien is a different concept from Human. 
Discover is derived from Cover. Discovery is derived from Discover. Discovery is related to Network. 
Immigrant <--DistinctFrom--> Native <--Antonym--> Alien <--DistinctFrom--> Human 
Cover <--DerivedFrom-- Discover <--DerivedFrom-- Discovery <--RelatedTo--> Network 