Good for nothings
Goods is already plural. The singular is good.
The plural of book is books. As in "these are good books".
The plural of fifty is fifties. As in "the fifties were a good decade".
Good for nothings
The plural of rhythm is rhythms. As in "the music has good rhythms.
The plural of interaction is interactions. As in "there were some good interactions today".
The concept of objective good can be both unitary and plural. In some ethical systems, there may be one ultimate objective good (unitary), while in others there could be multiple factors contributing to what is considered objectively good (plural). The perspective on whether objective good is unitary or plural can vary based on philosophical and cultural beliefs.
'authors' is the plural of 'author' it's so good to no to answer the question you no it.
You did well, you got it right in your question. Good for you!
The plural of text is texts. e.g. There are several good texts on that subject.
The plural of fire drill is fire drills. As in "fire drills are a good practice".
The word pheasants is the plural form of the noun pheasant.