Nonius Marcellus, Compendium of Doctrine, Vol. II (1888) - Page 16

Faustum auspicious and festum festive are distinguished by these meanings: indeed, faustum is said, as it were, from favendo favouring, and on account of this, [it means] prosperous and propitious; but festum [means] solemnly joyful and marked by a holiday. Virgil, Aeneid, book VI:

And festive days in the name of Phoebus.

[And] Terence:

O auspicious and happy day!

Between cuius whose and cuiatis of what country this is the difference: cuius is referred to the person of a man; cuiatis signifies from where [he comes]. Accius in Telephus:

We were never able to ascertain, though asking many questions, of what country he might be.

Animus mind/spirit and anima soul/life-force differ in this: animus is that by which we reason, anima is that by which we live. Accius in Epigoni:

We reason with the animus, we enjoy life with the anima. Without animus, the anima is weak.

Varro in Andabatis: In the remaining body, the anima is diffused from this source; from here, the animus is assigned for intelligence.

Vultus countenance/expression and facies face/appearance differ in this: vultus is the volition that is shown upon the face according to the movement of the mind; facies itself is the appearance of the mouth or general facial features. Sallust in Catiline: Indeed, in his face and expression there was madness. — Lucilius, Satires, book I:

Likewise, the expression, like the face, [shows] death, the jaundice disease, [and] poison.