Pick out the word whose underlined part is pronounced differently from the others

Pick out the word whose underlined part is pronounced differently from the others:
1.A.flood B.typhoon C.groom D.balloon
2.A.fly B.hobby C.energy D.ordinary
3.A.garbage B.garage C.sewage D.carriage
4.A.exchange B.champagne C.teacher D.children
5.A.fashion B.elephant C.champagne D.casual
6.A.cotton B.colorful C.comfort D.compass
7.A.uniform B.tIcket C.tide D.inspiration
8.A.want B.wall C.walk D.label