The nouns 'work' and 'etiquette' are both uncountable nouns. The term 'work etiquette' is an abstract noun, a term for a concept, an uncountable noun.
Note: The plural form 'works' is a count noun, a word for something produced; for example the artist's best work or all of the author's works.
Etiquettes
The word etiquette is a noun. The plural form is etiquettes.
The word etiquette is a noun. Nouns don't have tenses. Nouns are singular or plural, common or proper, concrete or abstract. Verbs have tenses, there is no verb form for etiquette. The noun etiquette is a singular, common, abstract noun.
The plural form is maids of all work.
The plural form of work chair is work chairs.
The plural form for the noun work is works. Example:The works of William Shakespeare sometimes need translation for modern English speakers.
The plural form of the noun elf is elves.The plural possessive form is elves'.Example: The elves' work is mischief. (the work of the elves)
The plural form of the compound noun 'work company' is:work companies
homework
The plural possessive form of the word "inductee" would be "inductees'." In this form, the apostrophe comes after the final "s" to indicate that multiple inductees possess something. For example, "The inductees' achievements were celebrated at the ceremony."
The plural form for the noun wish is wishes. The plural possessive form is wishes'.Example: All of my wishes' fulfillment is the result of hard work.
The plural form for the noun classmate is classmates.The plural possessive form is classmates'.Example: The classmates' hard work was easy to see in their project.