ensurer
noun
en·sur·er
| \ -u̇rə(r)\
plural ensurers
Definition of ensurer
: something or someone that makes something sure or certain : one that ensures something
an ensurer of success The birthstone for December is turquoise, which has long been regarded as a protective stone, a bringer of good fortune and ensurer of good health.— News-Sun (Sebring, Florida), 8 Dec. 2013