| TIARA | The Irish Ancestral Research Association | 爱尔兰祖先研究协会 |
| TIARA | Thousand Islands Area Residents Association (Ontario, Canada) | 千岛地区居民协会（加拿大安大略省） |
| TIARA | Texas Independent Auto Resellers Association (Austin, TX) | 德克萨斯州独立汽车经销商协会（德克萨斯州奥斯汀） |
| TIARA | Tokyo International Amateur Radio Association | 东京国际业余无线电协会 |
| TIARA | Target Illumination and Recovery Aids | 目标照明和恢复辅助 |
| TIARA | Task Inventory Analysis and Requirements Application | 任务清单分析和需求应用 |
| TIARA | Timely Information for All Relevant and Affordable (Singapore) | 所有相关和可负担的及时信息（新加坡） |
| TIARA | Tactical Intelligence And Related Activities | 战术情报和相关活动 |
| TIARA | Townsend Independent Actuarial Research Alliance (Wolcott, CT) | 汤森独立精算研究联盟（Wolcott，CT） |
| TIARA | Tactical Intelligence Analysis and Reporting Application | 战术情报分析和报告应用 |
| TIARA | Tornado Integrated Avionics Research Aircraft | 龙卷风综合航空电子研究飞机 |
| TIARA | Tamworth Independent Artist Recognition Awards (Australia) | 塔姆沃思独立艺术家认可奖（澳大利亚） |
| TIARA | Treatment Initiatives After Radiological Accidents (European Commission) | 辐射事故后的治疗措施（欧盟委员会） |
| TIARA | Tritium Inventory And Release Analysis | 氚库存和释放分析 |
| TIARA | TIARA Is A Recursive Acronym | TIARA是一个递归缩写 |
| TIARA | Task Inventory Analysis Review Application | 任务清单分析审核应用程序 |
| TIARA | Tamworth Independent Artists Recognition Award | 塔姆沃思独立艺术家认可奖 |
| TIARA | Tamworth Independent Artists Recognition Awards | 塔姆沃思独立艺术家表彰奖 |
| TIARA | Timely Information for All Relevant and Affordable | 及时提供所有相关且价格合理的信息 |
| TIARA | Togetherness, Independence, Academic, Respect, Achievement | 团结、独立、学术、尊重、成就 |