Synonyms of accidentally

Adverb

1. by chance, accidentally, circumstantially, unexpectedly

usage: without advance planning; "they met accidentally"

2. incidentally, accidentally

usage: of a minor or subordinate nature; "these magnificent achievements were only incidentally influenced by Oriental models"

3. unintentionally, accidentally

usage: without intention; in an unintentional manner; "she hit him unintentionally"