"The rumor that "orange" rhymes with no other word is incorrect. Orange rhymes with Blorenge (a mountain in Wales) and sporange (a sac where spores are made). "Silver" has the same rumor going for it, but it actually rhymes with Wilver (a nickname) and chilver (a ewe lamb)."
~ Dictionary.com
While eating an orange I went to the mountain of Blorenge,
To visit my friend Silver,
While we joked of his wilver,
Out of the blue came his chilver,
On it's back there sat a an odd sporange,
At this point we stopped rhyming and rushed the ewe to a vet,
Point is,
Don't keep lambs as a pet.
(Actually you can, but this poem says no.)