Concomitant, n.
One who, or that which, accompanies, or is collaterally connected with another; a companion; an associate; an accompaniment. Reproach is a concomitant to greatness. Addison. The other concomitant of ingratitude is hardheartedness. South.
1 other Webster entry under this spelling
Concomitant, a.
Accompanying; conjoined; attending. It has pleased our wise Creator to annex to several objects, as also to several of our thoughts, a concomitant pleasure. Locke.
Shades of meaning
Fernald has no entry of its own for concomitant; he lists it under appendage, circumstance.
Where he writes about it:
A circumstance (L. circum, around, and sto, stand), is something existing or occurring in connection with or relation to some other fact or event, modifying or throwing light upon the principal matter without affecting its essential character; an accompaniment is something that unites with the principal matter, tho not necessary to it; as, the piano accompaniment to a song; a concomitant goes with a thing in natural connection, but in a subordinate capacity, or perhaps in contrast; as, cheerfulness is a concomitant of virtue. — from circumstance
A circumstance is not strictly, nor usually, an occasion, condition, effect, or result. (See these words under cause.) Nor is the circumstance properly an incident. (See under accident.) We say, "My decision will depend upon circumstances"--not "upon incidents." That a man wore a blue necktie would not probably be the cause, occasion, condition, or concomitant of his committing murder; but it might be a very important circumstance in identifying him as the murderer. — from circumstance