Omissions rhymes with:
academicians, admissions, commission's, commissions, emissions, intermissions, mission's, missions, permissions, remissions, submissions, transmissions
Omissions sounds like:
omnicom's, oncogenes, oncoming, ongoing
academicians, admissions, commission's, commissions, emissions, intermissions, mission's, missions, permissions, remissions, submissions, transmissions
omnicom's, oncogenes, oncoming, ongoing