• ignorin,
• signodon,
• signoidal,
• signora,
• aignorina,
• zignorina,
• xignorina,
• dignorina,
• eignorina,
• wignorina,
• sugnorina,
• sjgnorina,
• skgnorina,
• sognorina,
• cignorina,
• sygnorina,
• signorine,
• sinnornis,
• Signothin,
• Signorinae

• signior,
• signora,
• signorile,
• signory,
• signorelli,
• signore,
• signer,
• signor.

The adjective form of the word "signorina" is "signorina" itself.

The plural form of "signorina" is "signorine".

The singular form of the word "signorina" is "signorina" itself. "Signorina" is already the singular form of the Italian word that means "Miss" or "young lady".