The combination uu occurs rarely in the English language and, other than continuum, muumuu and vacuum, in words which are unfamiliar or archaic. With the exception of Muumuu (Hawaiian) and (Welt)anschauung (German), they derive from Latin roots. It is highly debatable as to whether unuunilium should count, as it was firstly renamed to Ununilium, which in turn was renamed to the current Darmstadtium.
They are as follows: