Bantu-Nilotes-Cushites - are mostly terms used by kenyas. Uganda you'll mostly here of bantus, luos and nilo-hamitic. You are also likely to hear of regions being equal to tribes. Eastern. Northern. Central and Western...they equate region with culture/tribe.
In Ethiopia - my friend - laughed when he heard largest tribe in kenya was 8m - in Ethiopia - that would be classified under Southern Nations and other people. They don't register our tribal grouping like cushites- because Oromos, Amharas, Somalis and etc - some are 30M plus. The same is true for Nigeria where big tribes are nearly 50M each - Hausa, Igbo and Yoruba. So for them - you have Hausa, Igbo, Yoruba and other tribes.