Natura and ignis are the similar elements in the following contexts that indicate the identity in meaning between nutrimen and nutrimentum:
nempe ubi terra cibos alimentaque pinguia flammae
non dabit absumptis per longum viribus aevum
naturaeque suum nutrimen deerit edaci, Ov. M. 15, 354;
suscepit ignem foliis atque arida circum
nutrimenta dedit, Aen. 1, 176.
In the first example, curiously enough, nutrimen seems to be also synonymous with alimenta in the second line before it.
Nato and puerorum following oblectamina and oblectamenta indicate identity in meaning, although the latter is still vague, while the former is specified by “flores”: carpserat flores, quos oblectamina nato porrigeret, Ov. M. 9, 342; obsecro te non ut vincla virorum sint, sed ut oblectamenta puerorum, Par. 5, 2, 38.
We have the clear testimony of Varro that operculum and operimentum are both used to mean “covering”: quibus operibantur operimenta et opercula dixerunt, Varro, L. L. 5, 167; and the fact is illustrated by the following examples, in which both are used in the ablative after tego: aspera arteria tegitur quasi quodam operculo, N. 2, 54; nuces gemino protectae operimento sunt, Plin. 15, 22.
Both ornatus and ornamentum are used of a speech, oratio: mihi eripuisti ornamentum orationis meae, Planc. 83; reliqua quasi lumina afferunt magnum ornatum orationi, Or. 39, 134. The following examples of these nouns, although still general in meaning, are interesting as being used with the verb which is their stem: ornatus appellatur cultus ipse, quo quis ornatur, Fest. 184; hominem cum ornamentis omnibus exornatum adducite ad me, Bacc. 756.