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 singular form would be majesty.
The noun grandmother is the singular form.
..solo?
The word 'duo' is the singular form; the plural form is duos.
Yes, duet is a noun, a singular common noun.
The plural form of duet is duets.
The singular form of the demonstrative pronoun 'these' is this.
A song sung by two people is called a duet
The singular form of "that" is "it."
The singular form of "cuffs" is cuff.
The singular form of binoculars is "binocular."
The singular form of "stratum" is "stratum." The word does not change in its singular form.
The form hypothesis is the singular form. The plural form is hypotheses.
Phenomenon is the singular form of phenomena.