foolishness — resulting from or showing a lack of sense; ill-considered; unwise: a foolish action, a foolish speech.
humanness — of, pertaining to, characteristic of, or having the nature of people: human frailty.
lubricant — a substance, as oil or grease, for lessening friction, especially in the working parts of a mechanism.
lubricate — to apply some oily or greasy substance to (a machine, parts of a mechanism, etc.) in order to diminish friction; oil or grease (something).
ludicrous — causing laughter because of absurdity; provoking or deserving derision; ridiculous; laughable: a ludicrous lack of efficiency.
luminous — radiating or reflecting light; shining; bright.
mutinous — disposed to, engaged in, or involving revolt against authority.
ruthless — without pity or compassion; cruel; merciless: a ruthless tyrant.
scrupulous — having scruples, or moral or ethical standards; having or showing a strict regard for what one considers right; principled: scrupulous about defending human rights.
truthfulness — telling the truth, especially habitually: a truthful person.
usefulness — being of use or service; serving some purpose; advantageous, helpful, or of good effect: a useful member of society.
Four-or-more syllable rhymes
bituminous — of the nature of bitumen, esp. with regard to its color and combustibility
