Short answer: In standard English, there are no common perfect rhymes for “orange.”

If you allow rare words, proper nouns, or slant (near) rhymes, here are options:

Very rare/proper-noun near-perfect:
- Blorenge (a hill in Wales)
- Gorringe (surname)
- sporange (very rare botanical term)

Single-word near rhymes (slant):
- cringe, fringe, infringe, syringe
- binge, hinge, singe, twinge, tinge, whinge
- lozenge
- porridge, storage, forage, shortage, courage

Multi-word/phrase rhymes (often used in lyrics):
- door hinge
- four inch
