https://www.logos.com/product/29732/a-lexicon-of-saint-thomas-aquinas
Logos is primarily a greek shop. Plus some hebrew (from its earlier days). A little syriac and coptic. Then, there's latin.
But latin theologically 'colored' Christianity, in the same way earlier greek had. So, it's good to know about.
This lexicon is both unusual, and in-depth. It mainly shows up in the Verbum platinum plus collections. But an easy pick, to supplement your L&S and definitely Collins. With one very influential writer in view.
The PP has a decent look-inside.
