vigorously (adv.)
- actively
- alertly
- boldly
- briskly
- dynamically
- eagerly
- energetically
- firmly
- forcefully
- forcibly
- hardly
- heartily
- lustily
- mightily
- powerfully
- purposefully
- resolutely
- robustly
- spiritedly
- strenuously
- strongly
- unfalteringly
- vivaciously
- zealously