Like grass, moss is not generally referred to in plural, except when referring to different types of moss, in which case the plural form is mosses.
The plural noun is mosses, a word for 'types of' or 'kinds of' moss.
The noun 'moss' is an uncountable noun as a word for a form of plant life.
Example uses:
The wall was covered with clumps of moss.
There are several types of mosses indigenous to this area.
The plural of moss is mosses.
The plural of moss is mosses, e.g. several mosses grew on the tree.
The singular form for the plural noun mosses is moss.
The plural form ''moss'' is used to describe a group of the same type of moss. "Mosses" is used to describe groups of different types of moss that are together.
The singular possessive form is moss's.
The singular is moss; mosses is the plural for more than one moss.
Moss'
mushrooms
The singular possessive is fish's.
Buzz's is the singular possessive.
The word moss can be used either singular or plural.
The possessive form is Amos's.
Mary's is the singular possessive form.
Quantum is singular, not singular possessive. The singular possessive form is quantum's.
The singular possessive form of "test" is "test's".
The singular possessive pronouns are "my," "mine," "your," "yours," "his," "her," and "its."
The singular possessive of "ant" is "ant's" and the plural possessive is "ants'".
Museum is singular. Museum's is singular possessive. Museums is plural. Museums' is plural possessive.
The singular possessive of dish is dish's
The singular possessive form of "classmate" is "classmate's."
Grave's is the singular possessive.
The singular possessive is Martin's.
The singular possessive is fish's.
Buzz's is the singular possessive.
The singular possessive is biker's; the plural possessive is bikers'.