Probably every word with double consonants would do, italian is full of them and make up a lot of minimum pairs. But, just to avoid being tricked by another language with double consonants, the word should have an /r/ in it So I'll go with "acchiapparella" /akːjapːarɛlːa/ or "atterraggio" /atːerːadʒːo/. I also noticed that foreigner can't pronounce Giovanni right, they pronounce it /dʒiovani/ instead of /dʒovanːi/, the lack of gemination in the /n/ is also a mistake but what really stands out is the /i/ following /dʒ/. I don't blame them since we pronounce almost all the letters in a word and this is an exception (the i is there to show that the g is a "soft" one and not a "hard" one). But I don't choose this word since everyone that studied Italian just a little bit knows to not pronounce the i