The plural of iron is "irons."
The plural of compass is compasses.
"Force" is singular and "forces" is plural.
Pelvimeters is the plural of pelvimeter
The plural for motion is motions.
The plural of thermometer is thermometers.
It depends on the usage. This metal is heavy. its a noun. Iron is a type of metal. is an adjective because its describing the iron.
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.
Singular ; this and that Plural ; these and those
Singular noun ; Isthmus Plural noun ; Isthmi ( NOT isthmuses ; this is the verbal form of 'to isthmus'. e.g, Singular noun ; focus Plural noun ; foci 'Focuses' is from the verb 'to focus'.
The plural of rose is roses. The plural possessive is roses'.
The plural of 'bunch' is bunches.The plural of 'ant' is ants.The plural of 'batch' is batches.The plural of 'day' is days.The plural of 'chimney' is chimneys.The plural of 'tomato' is tomatoes.The plural of 'umbrella' is umbrellas.The plural of 'donkey' is donkeys.The plural of 'sky' is skies.The plural of 'foot' is feet.The plural of 'show' is shows.
applied is does not have a plural but is apply it does have a plural.
As a common noun ; singular ; can ( as in tin can) As a common noun ; plural ; cans ( as in tin cans)
The plural is a regular plural, attics.
The plural for the noun loss is losses; the plural possessive is losses'.
pluralsThe word plurals is the plural of plural. As in: I answered the question about plurals to the person who didn't know that the plural of plural is plurals.
"Ferias" is the plural of "Feria" - the Spanish for feastday/festival/fair.The possible English words are ferrous (containing iron) or furious (very angry).