The possessive form for the singular noun guess is guess's.
The singular noun is guess; the plural form is guesses.
The plural form of the noun guess is guesses.
The plural form of "guess" is "guesses."
The plural form of the noun 'guess' is guesses.
guesses
The plural form for the demonstrative pronoun this is these.
The plural form of the word inferno is infernos.
The plural of guess is guesses, e.g. It took him several guesses before he got the answer.
The plural form is ranches.
There is no plural form for the word, countries. This word itself is a plural.
There is no plural word for if.