Nouns ending with ch, sh, ss or x add es. Many nouns ending with f or fe change this to a v and add es. Nouns ending with a vowel + o add s. Nouns ending in a consonant and a y, you'll need to change the y to an i and add es.
A homophone is a word that is pronounced the same as another word but differs in meaning, and may differ in spelling. The words may be spelled the same, such as rose (flower) and rose (past tense of "rise"), or differently, such as carat, caret, and carrot, or to, two, and too.
Forming the Singular Possessive Form of Nouns. A possessive noun shows that someone (or something) owns an item. In the simplest cases, an apostrophe and the letter 's' are added to the noun to show that ownership. Some examples are baby's, boy's, and army's.