I have no idea what your question means.
Student or Learner
Hello ; I am not a native english speaker. I have a question, can I say : hyponyms number rule ? The first noun is in plural in this case Thanks in advance
Since both MikeNewYork and I - both of us native English speakers - have no idea what you mean, you may take it that you cannot say that phrase.
I'm not a teacher of English, but I have spoken it for (almost) all of my life....
Welcome to the forum, Hakim.
I had to look up hyponym, never having heard of it before. This is what it means:
(Macmillan)a word with a more specific meaning than another more general word of which it is an example. For example, “potato” is a hyponym of “vegetable.”
Even knowing that, I still don't understand the question.
I do know what hyponyms (and hyperonyms) are, but I know nothing about a hyponyms number rule.
If such a rule exists, then the phrase is grammatically OK, though hyponym would also work for me.