The plural of attorney is attorneys.
An attorney is a legal professional who is licensed to practice law and represents clients in various legal matters, such as litigation, negotiations, and legal advice.
When it comes to the plural form of "attorney," the correct usage is "attorneys." This follows the standard English grammar rule for forming plurals ending in a vowel followed by "-y" by simply adding an "-s" to the end of the noun.
Although you may come across the variant spelling "attornies," it is considered incorrect and should be avoided.
See the graph at the bottom of the page to compare the instances of the words attorneys and attornies in written English.
In terms of countability, the word "attorney" is considered a countable noun. It refers to an individual legal professional who is qualified to practice law. Each attorney represents a distinct individual in the legal field.
When we use the term "attorney," we are referring to a specific person who holds the title and fulfills the role of a legal representative. For example, we can say, "I hired an attorney to handle my case.
A collective noun refers to a singular noun that represents a group of individuals or things. Unfortunately, there isn't a specific collective noun for a group of attorneys. However, you can use general collective nouns like "group," "team," or "association" to refer to a gathering of attorneys.
The graph shows the occurances of the plural of attorney in written English since 1800 using Google's Ngram Viewer.
Sources:
https://www.collinsdictionary.com/dictionary/english/attorney