Neologism, literally ‘new word’, is not a word I hear spoken very often. I’ve always pronounced it /niˈɑləˌdʒɪz(ə)m/ – ‘nee-OL-uh-jiz-m’, more or less – but I’ve been wrong before about words I often see but seldom hear. So when I first heard /ˌniːəʊˈləʊdʒɪzəm / ‘nee-oh-LOW-jiz-um’, I wondered.
That first time was an American speaker. When I heard it again from an Irish person, I figured it for a variant. Finally I looked it up in a bunch of reliable dictionaries, including the OED, Macmillan, Collins, Merriam-Webster, American Heritage, ODO, and Cambridge. None of them included the variant.
Some dictionaries mention a slightly different second vowel sound – /ɒ/ or /ɑ:/ – but the stress pattern is always the same: primary stress on syllable 2, ‘OL’, secondary on syllable 4, the rest unstressed. [Edit: A few dictionaries list a variant with stress on syllable 1.] None includes a form with stress on syllable 3, ‘LOW’. Yet I’ve heard it from several native-English speakers, including a linguist, on different continents.
Curious about its distribution and perceived acceptability, I asked Twitter. (Or to use the popular journalistic idiom, I took to Twitter.)