Hate to sidetrack in what is otherwise an excellent set of definitions, but… > Stone is a portmanteau for the material from which rock is made… I do not think

Hate to sidetrack in what is otherwise an excellent set of definitions, but… > Stone is a portmanteau for the material from which rock is made… I do not think that word means what you think it means. But I also am not sure what word you were looking for to describe the relationship/distinction between the words ‘rock’ and ‘stone’. But it’s definitely not portmanteau. A portmanteau word is a word that is made by shoving two or more other words together, like ‘brunch’, or ‘hackathon’. Is it possible that because a portmanteau is also a word for a large suitcase, you are looking for a word that means ‘word that can contain a lot of distinct sub meanings?’