Unbiennium
unbiennium
Unbipentium
unbipentium
Unbiunium
unbiunium
Unnilennium
unnilennium
Ununennium
ununennium
Unbibium
unbibium
Unbihexium
unbihexium
Unbinilium
unbinilium
Unbioctium
unbioctium
Unbiseptium
unbiseptium
Unbitrium
unbitrium
Triennium
triennium
Unnilunium
unnilunium
Unbiquadium
unbiquadium
Ununbium
ununbium
unbrennbar
incombustible
Famennium
Famennian
Dezennium
decennium
Millennium
millennium
Quinquennium
five-year period
lustrum
quinquennium