One exception would be words loaned from Greek, like 'matematyka' or 'fizyka'. But I think they are being 'assimilated' so one can say that they do not count anyway.
Polish has also a fairly rich system of prefixes and suffixes and I think some of them would result in stressing some other syllable than the second to last (penultimate).
Polish has also a fairly rich system of prefixes and suffixes and I think some of them would result in stressing some other syllable than the second to last (penultimate).