[noun] [C], [adjective] [formal] - (something) happening together and connected with something elseLoss of memory is a natural concomitant of old age.The spread of Arabic outside the Arabian peninsula was concomitant with the spread of Islam in the 7th and 8th centuries AD.
CONCOMITANT
Meaning of CONCOMITANT in English
Cambridge English vocab. Кембриджский английский словарь. 2012