1. Think, thought, thesis, theme, thumb (th- sound)
2. This, that, these, those (th- sound)
3. Laughed, pushed, kicked (-ed ending)
4. Stayed, judged, stirred (-ed ending)
5. Sounded, stated, suggested (-ed ending)
6. Confidential, presidential, essential (-chull)
7. Precious, vicious, suspicious (-shus)
8. Prove, move, love, victory, voice (‘v’ sound)
9. Question, stanchion, mention, invention (-chun)
10. Partial, special, marshal (-shull)
11. Cordial, schedule (-jull), procedure (-jur)
12. Mature, adventure, century (-chur)
13. Costs, lists, ghosts (-sts); tasks, asks (-sks)
14. Really, restaurant, red (Portuguese have trouble with ‘r-’)
15. Vision, version, occasion (-zhun)
16. complicit, elicit, explicit, illicit, implicit, solicit
17. (-ile as “ull”) docile, facile, missile, hostile, tactile, puerile, versatile, servile, imbecile, projectile, fragile, textile, mobile
18. (-ile as “EYE ul'”) infantile, domicile, senile, reptile, juvenile, crocodile