The singular possessive is army's.The plural possessive is armies'.
Both armies quickly set up camp.adverb is quickly
the armies strategized for the upcoming battle looming over their general's head
Troops is plural. Troop is singular.
If you are asking what the plural noun of the word 'army' is, then it's armies.
The word army is a singular noun; armies is the plural form.
The noun armies' is the plural possessive for the singular army.
The singular possessive is army's.The plural possessive is armies'.
The armies' tanks were huge.
singular
Bacterium is the singular word.
the singular word it is salmon.
The singular word for adenomata is adenoma.
The word 'Phenomenon' is singular.
The word dog is the singular form.
Lance is singular.
singular of the word stitches is stitch.