Re: Singin
Oh yes, lots of words morph like that
waistcoat (Long A/long O-> morphs to weskit (schwa/short i!)
(in US there are 2 words-waistcoat (said as spelled), and weskit, a synonym!)
grindstone (pronounces as spelled in much of the US, but in UK grinstin.. (short i/short i)
Not to mention forecastle (focsle); boatswain (bosun); rowlock (rollock); forward (forr'd) and other nautical contractions.
Americans often pronounce forehead as fore head, but most of the rest of the English speaking world probably says "forrid."