The singular form of feet is foot.
The singular form is hilum.
The form plumber is the singular form; the plural form is plumbers.
The noun grandmother is the singular form.
The singular form would be majesty.
..solo?
Yes, duet is a noun, a singular common noun.
The plural form of duet is duets.
A song sung by two people is called a duet
The singular form of the demonstrative pronoun 'these' is this.
The singular form of feet is foot.
The singular form of "hypothysis" is "hypothesis."
The singular form is ombudsman.
it is already in its singular form.
The singular form is money.
The singular form of "cuffs" is cuff.
The singular form is hilum.