A word that group words that give the impression "There is a word for that!" and "Mot juste" is what I inquire. I can't find any term for it, and my search of the list only leads to a website like http://phrontistery.info/
A word for a list of words such as cajole and desiderium. I am not asking about words that have specific meaning, I am asking whether those words have a name that group them together.
Another way to see it, some words exist in dictionaries but not in thesaurus, what those words are named is my question.