A plural noun that becomes singular when you add s

[White Rabbit]

I'm sure many of you have heard of words such as bras, millionaires, and princes that become brass, millionairess, and princess respectively when the letter s is added to the end.

What I'd like to know: is there is a plural noun that, when it becomes singular after the addition of an s, still retains its original meaning? Princes comes close, but there is quite an obvious difference between prince and princess.

Is there such a noun, or am I searching in vain?

 

[susiedqq]

You have changed the entire word meaning by adding an "s" to these certain words.

bra - one brassiere, two bras.
I am taking two bras to wear on the trip.

brass - a soft metal, golden in color.
brass lamp.

one millionaire, two millionaires.
millionairess is a female millionaire.

prince = male
princess = female

 

[White Rabbit]

I don't think you've understood my post, susiedqq.

 

[Neillythere]

You've got me stumped, but I suspect that if there is such a word it may well end in a vowel +s, rather than a consonant +s (and the original word may be foreign)?

Maybe that will trigger someone off on a new track.

 

[Neillythere]

Although not correct, this is the sort of word I had in mind:

AskOxford: kudos

kudos /kyoodos/

• noun praise and honour.
— USAGE Despite appearances, kudos is not a plural form: there is no singular form kudo, and use as a plural, as in he received many kudos for his work, is incorrect. — ORIGIN Greek.

Hopefully, someone will find your word.