"Straight" is usually used as an adjective and English adjectives are usually the same whether they are singular or plural.
"Straight" is sometimes used to mean a heterosexual or conservative person. In this context, the plural would be "straights."
Both straights and gays are welcome to join PFLAG.
But in a formal context, it would be better to use "straight people" instead of "straights."
Be careful not to confuse "straight" with "strait" (a narrow body of water).
"raide" is an adjective meaning straight, stiff ("raides" in plural).
The plural of radius is radii. As in "the radii is a straight line extending from the centre of a circle to the circumference"
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".
Leukocytes is the plural of leukocyte
The plural noun is raisins.
The plural of "classification" is "classifications."