cupoc : cup
The Illunse word for cup is cupoc.
This word is a mixture of the Old English word for cup which is cuppe (cup, a small drinking vessel) and the Latin word for cup poculum (cup, bowl, drinking vessel; drink / draught).
cupocan : cups
The Illunse word for cups (nominative plural) is cupocan.
Cups in Latin is poculi. Cups in Old English is cuppan.
There will also be an Illunse word for goblet or chalice.