Sub-sets of Atheism or its denominations

Atheism is not a one body, out of confusion/doubt it is divided into divergent branches, disorders, schools of thinking; some of them claim to belong to Atheism (Agnosticism/Skepticism) from the position of ignorance while others from the position of knowledge as they claim. Right, please?
Why they be called sub-sets and why they cannot be called sects or denominations for understanding, please? Is there a language barrier/restriction, please? 

Thread: “Science does not support Atheism, does it? “Debating Christianity and Religion Forum Index -> Philosophy

Post 21:

X——- wrote: [Replying to post 19 by paarsurrey1] X——- wrote: There may be similarities but I don’t think it is necessary to equate subsets of theism or atheism as ‘denominations’. Denominations would be subsets of subsets of theism. Paarsurrey wrote: I am not equating them.Atheism is not a one body, out of confusion/doubt it is divided into divergent branches, disorders, schools of thinking; some of them claim to belong to Atheism (Agnosticism/Skepticism) from the position of ignorance while others from the position of knowledge as they claim. Right, please? Why they be called sub-sets and why they cannot be called sects or denominations for understanding, please? Is there a language barrier/restriction, please? Anybody, please Regards

Tags: Denominations, sects, Subsets