fellow men; between men; among men; man-to-man
fellow women; between women; among women; woman-to-woman
mankind; the human creature; fellow creatures
next-door neighbors; (living, sitting) next to each other
peers; friends; fellow workers; comrades
two people alike; two of a kind; kissing cousins; two people cut from the same cloth
two people alike; two of a kind; kissing cousins; two people cut from the same cloth
lovers; couple; soulmates; enthusiast; -aholic; -lover
friendly fire; killing each other by mistake; internecine strife
one's fellow workers; fellow employees
affection among kindred spirits; bonding; fellow feeling