Calm is the opposite of Chaos. Chaos is related to Crowd. Crowd is related to Numerous. Numerous is derived from Number. 
Cell is related to Alive. Alive is a different concept from Dead. Deadline is derived from Dead. 
Calm <--Antonym--> Chaos <--RelatedTo--> Crowd <--RelatedTo--> Numerous --DerivedFrom--> Number 
Cell <--RelatedTo--> Alive <--DistinctFrom--> Dead <--DerivedFrom-- Deadline 