omission
noun
1 there also appear to be some significant omissions from the Commission's report:
deletion, cut, exclusion, gap, blank, lacuna, hiatus;
oversight.
▷antonyms addition, inclusion.
2 the omission of the verb gives the sentence immediacy:
leaving out, exclusion, exception, non-inclusion, deletion, erasure, cut, excision, elimination, absence;
Linguistics aphesis, apheresis, apocope, apostrophe, asyndeton, elision, ellipsis, gapping, haplography, haplology, lipography, syncope;
rare expunction.
▷antonyms addition, inclusion.
omission Oxford Dictionary of English