63. In neuter nouns with liquid or nasal stems the nominative is the same as the stem.
- Stems in in- have e instead of i in the nominative, as in nōmen (stem nōmin-).
- Most stems in er- and or- have -us in the nominative.
genus, stem gener-1
64. Nouns of this class are declined as follows.
So also are declined
opus, -eris work
pīgnus, -eris or -oris pledge, etc.
Note— The following real or apparent liquid and nasal stems have the Genitive plural in -ium, and are to be classed with the i-stems:
imber, linter, ūter, venter; glīs, mās, mūs, [† rēn]
Also vīrēs (plural of vīs: see § 79).