The call number range for French printed dictionaries is PC2601 through PC2699. There are many non-circulating dictionaries in the Reference Collection on the 2nd floor of Alden Library. For volumes which you can check out, try the same call number area on the 7th floor.
Here are two major, multi-volume French dictionaries, both in the Reference Collection on the 2nd floor of Alden Library:
We have many additional dictionaries. Here are links to listings in ALICE:
Here's a link to search results in ALICE for many additional books on French grammar, mostly in the PC 2100+ call number area on the 7th floor.
And here are two websites on French grammar:
Books on French vocabulary are located in the PC2445 call number range. Here's a sample title:
And a thesaurus: