Nebulous, nonetheless Horace here is right about the pronunciation. Never mind the unstressed final you point out, the two words have different stress patterns. Tinnitus is stressed on the first syllable! TIN-i-tuss. Even in the common mispronunciation you are alluding to, even if it were tin-EYE-tiss, that isn’t quite a good rhyme for arth-RIGHT-issI would have preferred to see it say just that he needs to consult a dictionary, not so specifically a rhyming dictionary.
Right, the stowing-away is imlausible. But to give credit where due, there is the nice coincidence that the Woodstock festival and the Apollo 11 flight were at overlapping times in 1969. A movie based in that coincidence is “A Walk on the Moon” >
(Learning to spell ‘Misissippi’ from a cartoon) - I was going to say Jiminy Cricket, but no — that was for “encyclopedia” ! There is a rhythmic recitation or song for Mississippi, but I don’t recall it being from a cartoon.
Came here to say that too!