4/5th declension nouns

acies, aciei, f

line, battle line, army

dies, diei, m (occasionally f)

day

domus, domus, f

house, home

exercitus, exercitus, m

army

fides, fidei, f

trust, faith, confidence, loyalty

impetus, impetus, m

attack, impulse

manus, manus, f

hand, band

metus, metus, m

fear

passus, passus, m

pace

portus, portus, m

harbour, port

res, rei, f

thing, affair, matter, business

senatus, senatus, m

senate

spes, spei, f

hope

tumultus, tumultus, m

uproar, disturbance, civil war

usus, usus, m

use, experience, practice

vultus, vultus, m

face, expression