Fluid is etymologically related to Flow. 
Venture is a type of Go. Venture is a synonym of Guess. Guess is a synonym of Speculation. Speculation is derived from Speculate. 
Fluid --EtymologicallyRelatedTo--> Flow 
Go <--IsA-- Venture <--Synonym--> Guess <--Synonym--> Speculation --DerivedFrom--> Speculate 