COINCIDENTAL
coincident, coincidental, coinciding, concurrent, co-occurrent, cooccurring, simultaneous
(adjective) occurring or operating at the same time; “a series of coincident events”
Source: WordNet® 3.1
Etymology
Adjective
coincidental (comparative more coincidental, superlative most coincidental)
Occurring as or resulting from coincidence.
Happening or existing at the same time.
Anagrams
• nondialectic
Source: Wiktionary
Co*in`ci*den"tal, a.
Definition: Coincident.
Source: Webster’s Unabridged Dictionary 1913 Edition