Clarinum et Tsamicum

I know, these are not Latin words,
but how could the plural look in Latin?
Like:

Clarini et Tsamici

Corrections are most welcomed!

the -um ending, if nominative, is neuter second declension. like Greek, the plural would change the ending (-um) to -a.

I thought so, but how can I make it look more sophisticated? (for reasons of getting impressions and let it sound cool and ‘proffesional treatise’ lol like -aei?)