Do you pronounce it to rhyme with how Pig from Pipkins says 'tortoise'?
Fresh Water Mole loves his baby boy more and more every day,
Tue 5 Nov 2013, 12:30,
archived)
I don't know, but both porpoise and tortoise rhyme with noise
Wasp Box like a nervous random stranger at a glory hole,
Tue 5 Nov 2013, 15:44,
archived)