As nouns the difference between steam and mist
is that
steam is the vapor formed when water changes from liquid phase to gas phase while
mist is water or other liquid finely suspended in air.
As verbs the difference between steam and mist
is that
steam is to cook with steam while
mist is to form mist.
As an adjective steam
is old-fashioned; from before the digital age.
As an initialism STEAM
is initialism of Serial time-encoded amplified microscopy|Serial Time-Encoded Amplified Microscopy|lang=en.