Perfect rhymes:
* There aren't any perfect rhymes for "Inca" in the English language.
Near rhymes:
* Slinka (informal, playful)
* Pinker (less common, refers to a color)
* Whinca (archaic, Scottish word for "to whine")
Eye rhymes:
* Thinker
* Linker
* Sinker
Approximate rhymes:
* Minka (a type of house in Scandinavia)
* Tonka (a brand of toy trucks)
* Donka (a type of donkey)
Rhyming with a different pronunciation:
* Incarnate (pronounced "in-CAR-nate")
* Incantation (pronounced "in-can-TAY-shun")
The best rhyme for you will depend on the specific context of your poem or riddle.