• herit,
• theron,
• hearin,
• herei,
• reuoin,
• herorine,
• heprin,
• hurtin,
• heronie,
• cerain,
• heric,
• hermion,
• hereing,
• herdon,
• heronic,
• wherin,
• herion,
• heroe,
• hernan,
• heroien

• herring,
• herein,
• Hern,
• hearron,
• huron,
• herren,
• Hearn,
• hearon,
• heroine,
• heroic,
• Herrin,
• heeren,
• herron,
• Hearne,
• heron.

The adjective form of the word "heroin" is "heroic".

The plural form of the word "heroin" is "heroins".

The singular form of the word "heroin" is also "heroin". It is a noun that remains unchanged in its singular and plural form.