What are the basic Italian plural rules?

Masculine nouns ending in -o take -i (libro to libri), feminine nouns ending in -a take -e (casa to case), and nouns of either gender ending in -e take -i (cane to cani). These three rules cover most words.

Why does amica become amiche and not amice?

Nouns ending in -ca and -ga add an h in the plural (amiche, paghe) to keep the hard c and g sounds. Without the h the c would soften to a ch sound, changing the pronunciation.

How are -cia and -gia handled?

If a vowel comes before -cia or -gia, the i is kept: camicia becomes camicie. If a consonant comes before it, the i is dropped: arancia becomes arance. The tool checks the preceding letter automatically.

Why are -co, -go, and -io flagged?

Their plural depends on where the stress falls, which the spelling alone does not reveal. Fuoco becomes fuochi but amico becomes amici; figlio becomes figli but zio becomes zii. The tool gives the most common form and flags the exception.

Which words stay the same in the plural?

Words ending in an accented vowel (citta, virtu), foreign words ending in a consonant (sport, film, bar), and words already ending in -i (crisi, analisi) are invariable and do not change. Some masculine nouns in -a like problema are exceptions that take -i.

Italian Plural Helper

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Italian plurals are mostly regular but carry a few spelling traps that change the letters to preserve pronunciation. This helper applies the standard rules and the common adjustments, and it is honest about the cases where stress or gender — which the spelling cannot show — decide the ending.

How it works

The tool reads the ending of each noun and applies the matching rule:

-o  → -i     libro → libri        (masculine)
-a  → -e     casa  → case         (feminine)
-e  → -i     cane  → cani         (either gender)
-ca → -che   amica → amiche       (keep the hard c)
-ga → -ghe   paga  → paghe        (keep the hard g)
-cia/-gia    after a vowel keep the i, after a consonant drop it

For -co, -go, and -io, the plural depends on stress, so the tool gives the most common form (fuoco → fuochi, figlio → figli) and adds a note pointing out the alternative (amico → amici, zio → zii).

Example and tips

Run arancia and camicia together to see the -cia rule both ways: arancia → arance (consonant before, i dropped) versus camicia → camicie (vowel before, i kept). Treat the flagged -co, -go, and -io results as suggestions to verify, and remember the small set of masculine nouns in -a such as problema, programma, and tema, which take -i rather than the regular -e.