Similar to monstrum
- mons – mount, mountain
- monstro – appoint, nominate, ordain, point out, to ordain, to show
- rostrum – beak, bill of a bird
- claustrum – bar, bolt, cloister, den, enclosure, pen, prison
- castrum – castle, fort, fortified encampment, fortress, station
- atrum – dark, gloomy
- antrum – grotto