Perplexing plural problem

Is there any word which has no s on the plural form, but has one on the singular?

Just a thought!

[Dany]

Originally Posted by Unregistered

Is there any word which has no s on the plural form, but has one on the singular?

Just a thought!

I don't think so. But when there is any word, I don't know it

[Casiopea]

Originally Posted by Unregistered

Is there any word which has no s on the plural form, but has one on the singular? Just a thought!

Nouns of Latin or Greek origin:

nucleus, nuclei
syllabus, syllabi
focus, foci
fungus, fungi
cactus, cacti
alumnus = alumni

Source: webster.commnet.ed

[RonBee]

Originally Posted by Casiopea

Nouns of Latin or Greek origin:

nucleus, nuclei
syllabus, syllabi
focus, foci
fungus, fungi
cactus, cacti
alumnus = alumni

Excellent!

[Casiopea]

Originally Posted by RonBee

Excellent!

Latin 101, coupled with additional examples from webster communication net My memory is failing me.