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| Subject | Arabic | English |
| UN | اجتماع 2010 - تحدي التنوع البيولوجي العالمي | 2010 - Global Biodiversity Challenge |
| econ. | تحدي الأسعار | undercutting |
| comp., MS | تحدي وسيلة الدفع | payment instrument challenge (A fraud prevention mechanism that attempts to verify that an individual using a payment instrument is authorized to use or is the owner of that instrument) |
| IMF. | مؤسسة تحدي الألفية | Millenium Challenge Corporation |