words of the 3rd declension, 1st group
imperator, imperatoris victorious commander
mater, matris (f) mother → mater > O.E. modor > PDE mother
mulier, mulieris (f) woman
pater, patris father → pater > O.E. fæder > PDE. father
pedes, peditis infantryman
princeps, principis prince, head
cupiditas, cupiditatis (f) craving
honor, honoris honor, public role, position
libertas, libertatis (f) freedom
mos, moris tradition, habit, custom
ratio, rationis (f) calculation, reason / motive
salus, salutis (f) safety
senectus, senectutis (f) old age
socìetas, societatis (f) alliance
virtus, virtutis (f) virtue, merit, quality
voluptas, voluptatis (f) pleasure, passion
civitas, civitatis (f) citizenship, city
legio, legionis (f) legion
oratio, orationis (f) discourse, argument
plebs, plebis (f) common folk, plebs
rumor, rumoris fame, reputation, rumor
sermo, sermonis discourse
facinus, facinoris challenge, action
frigus, frigoris cold (noun)
iter, itineris journey, route
scelus, sceleris crime, felony, murder
tempus, temporis time, occasion, moment, circumstance
caput, capitis head (body)
carmen, carminis poetry, song
litus, litoris shore, coast
munus, muneris gift, task, responsibility