intently (adv.)
- advertently
- ardently
- assiduously
- attentively
- closely
- continuously
- determinedly
- devotedly
- devoutly
- doggedly
- eagerly
- earnestly
- fervently
- fervidly
- fixedly
- heartily
- heatedly
- heedfully
- intensely
- interestedly
- keenly
- mindfully
- observantly
- passionately
- seriously
- sharply
- sincerely
- steadfastly
- steadily
- studiously
- vehemently
- zealously