• clombia,
• coulmbia,
• culumbia,
• columia,
• tocolombia,
• cloumbia,
• columbis,
• coulumbia,
• colunmbia,
• columbea,
• clumbia,
• colombine,
• colomiba,
• coloumbia,
• coumbia,
• collumbia,
• comobia,
• colobia,
• colombias,
• colubia

• collembola,
• columbary,
• columbus,
• columba,
• colombo,
• coulombe,
• collembolan,
• columbia,
• columbian,
• coulomb,
• columbarium,
• columbo,
• columbidae,
• colombian,
• colomb.

The adjective form of "Colombia" is "Colombian".

The plural form of the word "Colombia" is still "Colombia." The word does not change when referring to multiple instances of the country.

The singular form of the word "Colombia" remains the same, as it is already singular.