The /e/ vowel is spelled <e> throughout. The diphthong /ʊə/ is spelled <our>, <oor> or <ur> in jury. The pair congress/congruous is of doubtful status since congruous would normally be perceived as a three-syllable word in which /ʊə/ is two vowels and not a diphthong. This dictionary gives /bʊən/ as the preferred pronunciation of bourne, though another common pronunciation is /bɔn/.
This is a contrast between a short front vowel and a back centring diphthong, and is no problem for any learner.
ben bourn bens bournes Bess bourse congress congruous Delhi dourly jerry jury jerries juries lead lured Les lures Med moored Ted toured