- Regressively Adv.
- Regretably Adv.
- Regretfully Adv.
- Regrettably Adv.
- Regular Adj. Subst. Adv.
- Regularly Adv.
- Regulatively Adv.
- Regulatorily Adv.
- Rejoicingly Adv.
- Relatively Adv.
- Relativistically Adv.
- Relentingly Adv.
- Relentlessly Adv.
- Relevantly Adv.
- Reliably Adv.
- Reliantly Adv.
- Religiously Adv.
- Reluctantly Adv.
- Remarkably Adv.
- Remedially Adv.
- Reminiscently Adv.
- Remissly Adv.
- Remittently Adv.
- Remonstrantly Adv.
- Remonstratingly Adv.
- Remorsefully Adv.
- Remorselessly Adv.
- Remotely Adv.
- Remuneratively Adv.
- Repeatedly Adv.
- Repellently Adv.
- Repentantly Adv.
- Repetitiously Adv.
- Repetitively Adv.
- Reportedly Adv.
- Reportingly Adv.
- Reposefully Adv.
- Reprehensibly Adv.
- Representationally Adv.
- Representatively Adv.
- Repressively Adv.
- Reproachfully Adv.
- Reproachingly Adv.
- Reproductively Adv.
- Reprovingly Adv.
- Repugnantly Adv.
- Repulsively Adv.
- Reputably Adv.
- Reputedly Adv.
- Requisitely Adv.
- Resentfully Adv.
- Reservedly Adv.
- Residentially Adv.
- Residually Adv.
- Resignedly Adv.
- Resiliently Adv.
- Resinlike Adj. Adv.
- Resistably Adv.
- Resistantly Adv.
- Resistibly Adv.