Nonius Marcellus, Compendium of Doctrine, Vol. II

...that the preceding section describes the composition of a work; poesis is the whole work, just as the entire Iliad is one synthesis composition, and the Annals of Ennius; and from this, one book is much greater than that which I said before [is a] poema. Therefore I say: no one who blames Homer blames the whole, nor [blames] that which I said before [is a] poesis; but he blames one word, an enthymema rhetorical syllogism, or a passage.

Varro in Parmenon: A poema is a rhythmic composition original: "lexis enrythmos", that is, many words put together metrically into a certain form. Therefore, they even call a couplet or an epigram a poema. Poesis is a perpetual argument in rhythms, such as the Iliad of Homer and the Annals of Ennius. Poetice poetics is the art of these things.

[Fora public squares and fori gangways/benches differ in gender as well as in meaning. For the neuter is the seat of judgments and lawsuits, while the masculine [refers to] the more open spaces in ships or in gladiatorial games.]

Doctum learned and peritum skilled/experienced, though they seem similar, are distinguished by M. Tullius Cicero, so that peritum is more than doctum, in On Duties, book III: Therefore, when they are learned by the skilled, they easily desist from their opinion.

Between urbs city (the buildings) and civitas citizenship/body of citizens this is the difference: urbs is the building, civitas is the inhabitants. Virgil, Aeneid, book I: