• inchon,
• uncheon,
• jncheon,
• kncheon,
• oncheon,
• 9ncheon,
• 8ncheon,
• ibcheon,
• imcheon,
• ijcheon,
• ihcheon,
• inxheon,
• inchyeon,
• inceon,
• inchen,
• incehon,
• incheonn,
• Inchenon,
• Inchenan,
• Inchean

• in concert,
• inconel,
• Inocencio,
• in common,
• inchon,
• Inocencia.

The adjective form of the word "Incheon" is "Incheonean".

The plural form of the word "Incheon" is "Incheons".

The singular form of "Incheon" is still "Incheon". The word does not change its form to singular or plural.