Heartening rhymes with:
disheartening, disheartening, smartening, disheartening, shortening, smartening, battening, brightening, captaining, disheartening, enlightening, fattening, flattening, frightening, heightening, lightening, shortening, smartening, straightening, sweetening, threatening, tightening
Heartening sounds like:
harden's, hardening, hardens, harding, harding's, hardness, harting, hartness, hartong, hartung, herding, herting, hoarding, hurting