Basis is a type of Assumption. Assumption is derived from Assume. Assume is a synonym of Seem. Seem is a type of Be. 
Privilege is a synonym of Claim. Claim is the opposite of Reject. Reject is a synonym of Alien. Alien is related to Planet. 
Basis --IsA--> Assumption --DerivedFrom--> Assume <--Synonym--> Seem --IsA--> Be 
Privilege <--Synonym--> Claim <--Antonym--> Reject <--Synonym--> Alien <--RelatedTo--> Planet 