The IPA/SAMPA /əʊ/@U/ represents the RP value for this phoneme but it is widely used in dictionaries. In Australian and American pronunciation the value is closer to /oʊ/oU/. All of these representations refer to the same phoneme.
For more rhymes, add er to some nouns and adjectives at -əʊn.
In non-rhotic accents, words ending in -əʊnə are also rhymes for words on this page.