What is the collective noun for steam engines?

Answer 1

There is no specific collective noun for steam engines, in which case any noun suitable for the context will work; for example a collection of steam engines, a display of steam engines, a museum of steam engines, etc.

Answer 2

The plural form of "steam engine" is "steam engines."

Answer 3

The plural form of the compound noun 'steam iron' is steam irons.

Answer 4

The plural of steam iron is steam irons.