sweet·en·er 
(swētn-ər)
(swētn-ər)n.
1. Something that sweetens.
2. Informal Something added as a further inducement or incentive.
- Marcus Aurelius Claudius Gothicus.
- Marcus Cook
- Marcuse
- Marcus Fabius Quintilianus.
- Marcus Junius
- Marcus Licinius
- Marcus (Moziah) Aurelius
- Marcus Porcius
- Marcus Porcius
- Marcus Rothkowitz.
- Marcus Terentius
- Marcus Tullius
- Marcus Ulpius Trajanus.
- Marcus Valerius Martialis.
- Marcus Vipsanius
- Marcus Vitruvius Pollio.
- Marcy
- Mar del Plata
- Mardi Gras
- Marduk
- mare
- mare
- Marengo
- mare's nest
- mare's-tail