Formal vs Informal Vocabulary List
| Formal | Informal |
| Reside | Live |
| Entire | Whole |
| Explode | Blow up |
| Gratitude | Thanks |
| Inferior | Worse |
| Preserve | Keep |
| Indistinct | Dim |
| Demise | Death |
| Occupation | Job |
| Father | Dad |
| Futile | Hopeless |
| Visit | Call on |
| Complete | Whole |
| Liberate | Free |
| Obtain | Get |
| Permit | Let |
| Nevertheless | Anyway |
| In my opinion | I think |
| Acceptable | All right |
| Tolerate | Put up |
| Formal | Informal |
| Request | Ask for |
| Investigate | Look into |
| Consult | Refer to |
| Famished | Hungry |
| However | But |
| Incorrect | Wrong |
| Insane | Mad |
| Allow | Let |
| Avid | Eager |
| Challenge | Dare |
| Damage | Hurt |
| Demonstrate | Show |
| Evade | Avoid |
| ill | Sick |
| Quit | Give up |
| Vacant | Empty |
| Repair | Mend |
| Notion | Idea |
| Observe | See |
| Require | Need |
