• tivoliu,
• rribolium,
• fribolium,
• gribolium,
• yribolium,
• 6ribolium,
• 5ribolium,
• teibolium,
• tribllium,
• triobolium,
• tribolim,
• triboluim,
• tribolyum,
• tribulur,
• tritolium,
• tryfolium,
• triosium,
• tritovuum,
• triboluums,
• tribolums

• tribologist,
• tribal,
• tribology,
• triboloby,
• tribulus,
• Tribble,
• tripoli,
• trifolium,
• treble,
• tribalism.

The plural form of the word "tribolium" is "triboliums"

The singular form of the word "tribolium" is "tribolium". It remains the same in both singular and plural form.