concomitant \kuhn-KOM-uh-tuhnt\ (adjective) - Accompanying; attendant; occurring or existing concurrently.
(noun) - Something that accompanies or is collaterally connected with something else; an accompaniment.
"She began also to understand what it was that had brought about her son's love, and to feel that but for certain unfortunate concomitant circumstances the girl before her might have made a fitting Lady Lufton." -- Anthony Trollope, 'Framley Parsonage'
Concomitant comes from the present participle of Latin concomitari, to accompany, from com- (used intensively) + comitari, to accompany, from comes, comit-, a companion.