No, the noun extension is the singular form; the plural form is extensions.
The plural of 'this' is 'these' and the plural of 'that' is 'those'.
The plural form of can is cans.
The plural for the noun loss is losses; the plural possessive is losses'.
The plural is a normal S plural, associates.
The plural is a normal S plural, races.
The plural form for table leaf is table leaves.
That is the correct spelling of "stilt" -- normally plural as "stilts" (extension poles for the legs).
If you mean flagella, that is the plural of flagellum. A flagellum is a long tapered extension of a microorganism, like a tail, utilized for mobility somewhat similarly to the tail of a fish.
The word "allowable" is an adjective, and would not have a plural. You could state that there were allowable items, or allowable actions.* The "allowable" referred to in legal and commercial documents is a noun form, by extension, of terms such as deductible(which is also formally an adjective). In this case, the plural would use just the usual S, as "allowables".
What is the file extension What is the file extension
sensory extension
the extension is .in
hair extension
unemployment is about run out. how do I apply for an extension.
form_title= Extension Cord form_header= Install extension cords in your office. What size extension cord do you need?*= _ [50] What color extension cord do you need?*= _ [50] Do you need a 3 prong extension cord?*= () Yes () No
You can plug an extension cord into another extension cord. A extension cord is to help make doing something easier.
They transfer [short, Dna] plasmids from Cell to Cell via a spike-shaped cytoplasmic extension known as a pillus (plural = pilli). Naturally, these pilli have a place of attachment.