Ibero-mesornis is a prehistoric bird genus that lived during the Late Jurassic period. While there are no direct synonyms for this specific genus, there are many words and terms that can be used to describe it. For example, ibero-mesornis is a type of enantiornithean bird, meaning it had a unique bone structure in its pelvis. It was also a small bird, likely weighing less than half a kilogram. Other terms that could be used to describe ibero-mesornis might include avian, avifauna, prehistoric bird, fossil bird, or Jurassic bird. Overall, there are many ways to describe the unique and fascinating creature that was ibero-mesornis.