Concomitant
/kənˈkɒmɪtənt/
noun
Something happening or existing at the same time.
An invariant homogeneous polynomial in the coefficients of a form, a covariant variable, and a contravariant variable.
Synonyms: accompaniment, co-occurrence
adjective
Accompanying; conjoining; attending; concurrent.
Synonyms: accompanying, adjoining, attendant, incidental