Radius. The plural form would be radii.
The plural form of the compound noun 'take off' is take offs.Example:On a commuter flight, a crew can have several take offs in a day.
The word 'neither' is a conjunction which doesn't have a plural or possessive form. The word 'neither' is an adjective which doesn't have a plural or possessive form. The word 'neither' is an adverb which doesn't have a plural or possessive form. The word 'neither' is an indefinite pronoun meaning not one and not the other of two or more people or things. There is no plural or possessive form for saying 'not one or the other'. The pronoun 'neither' can take a singular or plural verb form, depending on use.
The singular noun is quiz, and quizzes doubles the Zbefore adding -es. This is one of the many ways to form a plural in English, so it might or might not be called "irregular" (as are child-children, goose-geese).
Lady's is a singular possessive noun; slipper is a singular noun. The plural form of lady is ladies; the plural possessive is ladies'. The plural form of slipper is slippers.Lady's slippers is the plural form of one lady possessing more than one slipper.Ladies' slippers is the plural form of more than one lady possessing more than one slipper.
weaponry I'm not sure of the correct answer but weaponry is wrong, I'm take a quiz and it's the same question and the choices are: ---- (A) Weapons(B) Weapon's(C)Weapons'(D) Weapon' so one of these is the correct answer
There's only one 1989. There is no plural.
Women is the plural form.
The plural of "this" is "these" (referring to more than one thing).
The plural form for: Infection is infections, indicating that you have more than one infection.
The plural form of manservant is menservants.The plural of manservant (one word) is menservants.