The noun 'honesty' is an uncountable noun, a word for a concept, it has no plural form.
The possessive form is honesty's. Example:
Honesty's reward is not monetary.
The singular possessive form for the noun Phillip is Phillip's.The plural form for the noun Phillip is Phillips; the plural possessive form is Phillips'.The singular possessive form for the noun Phillips is Phillips's.The plural form for the noun Phillips is Phillipses; the plural possessive form is Phillipses'.
The possessive form of the plural noun Greeks is Greeks'.example: Many elements of the ancient Greeks' culture is still in fashion today.
The word honesty is a noun, a singular, common, abstract noun.
The possessive form for the Marx Brothers is the Marx Brothers'.example: The Marx Brothers' nonsense is still popular today..
“Ethics” is plural; “ethic” is singular. People usually use the term in the plural (“ethics”), as in, “Ethics are an important part of any successful business.” However, “ethic” (singular) is also seen on occasion: “He has a great work ethic.”
Singular possessive: secretary's Plural: secretaries Plural possessive: secretaries'
The plural is relatives. The plural possessive is relatives'.
The plural is lads. The plural possessive is lads'.
The plural form is echoes. The plural possessive is echoes'.
The plural form is suffixes. The plural possessive is suffixes'.
The plural form is Mexicans. The plural possessive is Mexicans'.
The plural form is stepsisters. The plural possessive is stepsisters'.
The plural form is inches. The plural possessive is inches'.
The plural possessive of "Father" is, "Fathers"
The plural possessive of bandit is bandits'.
Studies' is the plural possessive of study.
Coaster's is singular possessive. The plural is coasters, the plural possessive is coasters'.