Can you add following Italian monolingual dictionaries for Italian course? Treccani seems to be the richest online source especially for rare or outdated words/word-forms.
I am adding links for the word “casa” to be clear especially for the second dictionary (it adds the first letter of the word as a directory):
casa in Vocabolario - Treccani
meanings of some words are seperated and a number added at the end (i.e there are links with fare1 and fare2 but not with fare) so below version can be added instead which shows search results:
casa: definizioni, etimologia e citazioni nel Vocabolario Treccani