Explore is a synonym of Seek. Seek is related to Apply. Apply is related to Member. 
Mobile is a synonym of Fluid. Air is a type of Fluid. Air is related to Stuff. 
Explore <--Synonym--> Seek <--RelatedTo--> Apply <--RelatedTo--> Member 
Mobile <--Synonym--> Fluid <--IsA-- Air <--RelatedTo--> Stuff 