What rhymes with orange?

Orange has almost no perfect rhymes.

However, there are two proper names in the English language that rhyme with orange. They are Blorenge and Gorringe. The former is the name of a hill in the UK and the latter is a surname in Britain. Both are accepted as English proper nouns.

Sporange rhymes with orange.
It is a very rarely-used version of the word "sporangium", which is the botanical term for a part of a fern or a similar plant. Sporangium/sporange also means the part of a plant (or fungus) that contains the spores.
Orange rhymes with Blorenge (a mountain in Wales).