Reckon is a verb meaning to think or suppose something is true, or to calculate or estimate something. In everyday speech it often signals tentative belief or casual estimation, as in
Reckoning
How to Pronounce Reckoning
Reclamation
How to Pronounce Reclamation
Recluse
How to Pronounce Recluse
Recognition
How to Pronounce Recognition
Recognizance
How to Pronounce Recognizance