yes it is a word
Yes, the word America is a noun, a proper noun, the name of a specific place.
AMERICA
It's actually still CENSUS (and not censi as others would tell you). Since it is a neutral fourth declension, the plural ending is still -us (not -i as it would be for 2nd declension)
Chummy means friendly; as far as I know the word means the same thing in America as it does in Britain.
usted ... or tú (informal) Also consider: Singular: "usted" (formal) or "tú" (informal) or "vos" (Chile, Argentina, Uruguay and some Central-American countries). Plural: "ustedes" (America formal and informal plural; only formal in Spain) or "vosotros" (informal plural in Spain; religious in America).
The word crises is a plural word; it is the plural form of the word crisis.
There is no plural word for if.
The plural form for the demonstrative pronoun this is these.
A non-plural word, a word (noun or pronoun) that is not plural is singular, a word for just one.
The plural word of delay is delays.
the plural word is comedones
No it's a singular word. A plural word would be "have".
The plural of the word "raisin" is "raisins."
Leukocytes is the plural of leukocyte
The plural of the word "classification" is "classifications."
The plural of the word brush is brushes. As in "she brushes her hair".