M
malice, anger, uncharitableness, and indignation
malignity, brutality, malevolence, and inhumanity
manners, morals, habits, and behavior
marvelous, wonderful, extraordinary, and incredible
massive, ponderous, solid, and substantial
mastery, proficiency, dexterity, and superiority
matchless, unrivaled, inimitable, and incomparable
maxim, proverb, truism, and apothegm [apothegm = terse, witty, instructive saying]
medley, mixture, jumble, and hodge-podge
meekness, inwardness, patience, and self-denial
merciless, remorseless, relentless, and ruthless
mild, gentle, humble, and submissive
mismanagement, indecision, obstinacy, and hardihood
mixture, medley, variety, and diversification
modesty, fineness, sensitiveness, and fastidiousness
money, position, power, and consequence
mood, temper, humor, and caprice
motive, impulse, incentive, and intimation
mysterious, dark, secret, and enigmatical