Common Words:
* ant
* giant
* tenant
* servant
* infant
* pleasant
* important
* instant
* constant
* distant
* brilliant
* relevant
* abundant
* different
* assistant
* inhabitant
Less Common Words:
* arrogant
* defiant
* elegant
* hesitant
* ignorant
* insignificant
* militant
* observant
* reluctant
* tolerant
* transparent
* vibrant
* voracious
Words with Specific Meanings:
* accountant (person who keeps financial records)
* applicant (person who applies for something)
* consultant (person who gives expert advice)
* defendant (person accused of a crime)
* inhabitant (person living in a particular place)
* participant (person taking part in an activity)
* president (leader of a country or organization)
* protestant (member of a Christian denomination)
* repentant (feeling regret for wrongdoing)
* suspectant (person suspected of something)
This is just a sample list, and there are many more words ending in "ant".