100 Formal and Informal Words
| Informal | Formal |
| Ask for | Request |
| Look into | Investigate |
| Refer to | Consult |
| Hungry | Famished |
| But | However |
| Wrong | Incorrect |
| Mad | Insane |
| Let | Allow |
| Eager | Avid |
| Dare | Challenge |
| Hurt | Damage |
| Show | Demonstrate |
| Avoid | Evade |
| Sick | ill |
| Give up | Quit |
| Empty | Vacant |
| Mend | Repair |
| Idea | Notion |
| See | Observe |
| Need | Require |
| Informal | Formal |
| Live | Reside |
| Whole | Entire |
| Blow up | Explode |
| Thanks | Gratitude |
| Worse | Inferior |
| Keep | Preserve |
| Dim | Indistinct |
| Death | Demise |
| Job | Occupation |
| Dad | Father |
| Hopeless | Futile |
| Call on | Visit |
| Whole | Complete |
| Free | Liberate |
| Get | Obtain |
| Let | Permit |
| Anyway | Nevertheless |
| I think | In my opinion |
| All right | Acceptable |
| Put up | Tolerate |
| Informal | Formal |
| Set up | Establish |
| Put off | Postpone |
| Seem | Appear |
| Want | Desire |
| Say no | Reject |
| Sight | Vision |
| Worse | Inferior |
| Dim | Indistinct |
| Tell | Inform |
| Use | Consume |
| Shorten | Decrease |
| Mainly | Principally |
| Lack | Deficiency |
| Mad | Insane |
| Empty | Vacant |
| Clear | Transparent |
| Cheap | Inexpensive |
| Lucky | Fortunate |
| Give | Provide |
| But | Purchase |
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