The definition for combustion is "Act of burning." Used in a sentence: Campers must use fire with great caution to prevent combustion of the parched brush. The definition for appalling is "inspiring dismay or disgust.", the definition for benefactor is "One who offers financial help.", and the definition for corrective is "Intended to correct."

The definition for catastrophic is "Relating to extreme misfortune." Used in a sentence: The effects of the massive hurricane were catastrophic. The definition for methodical is "performed in an orderly manner.", the definition for moderate is "Tending toward the average.", and the definition for appraise is "To evaluate the worth of."

The definition for plaudits is "Enthusiastic approval." Used in a sentence: Allison's painting met with plaudits from the critics, who had dismissed her earlier work. The definition for extol is "to praise highly.", the definition for compulsion is "An irresistible impulse.", and the definition for melee is "A tumultuous fight among several people."

The definition for fraud is "Trick." Used in a sentence: The con man's fraud involved selling swampland to gullible investors. The definition for apathetic is "showing little or no emotion.", the definition for ecstatic is "Overwhelmingly emotional.", and the definition for buffoonery is "Foolish behavior."

The definition for incumbent is "Necessary as a duty or responsibility." Used in a sentence: It was incumbent on Jack to attend his father's retirement party. The definition for genial is "sympathetic, friendly.", the definition for diffident is "Lacking self–confidence.", and the definition for combustion is "Act of burning."