smokefall

As nouns the difference between smokefall and smokeball

is that smokefall is the close of the day before nightfall, when fog comes while smokeball is {{cx|military|lang=en}} A ball or case containing a substance that produces thick smoke when it burns.

As nouns the difference between taxonomy and smokefall

is that taxonomy is the science or the technique used to make a classification while smokefall is the close of the day before nightfall, when fog comes.