Here's what rhymes with acknowledgment.

Consider these alternatives

apology / quality implicit / visit belated / related affirmation / information apologies / qualities acquiescence / presence denial / trial acknowledge / college rebuke / puke recognition / position contrition / position explicit / visit nod / not repudiation / operation allusion / conclusion denunciation / relation renunciation / relation indication / education impatience / relations gratitude / food unspoken / broken distaste / based regret / yet forthright / right disdain / main recognizing / rising explanation / relation implying / trying remorse / course hesitation / information