Monorail		a contagious disease that makes one feel tired
Monosyllable		a word that has only one unit of sound
Monolith		a large single block of stone
Monogram		to have control or make use of excluding others
Monopolize		a single unvaried pitch level in speech or sound
Monologue		a long speech made by one person
Monotone		a design of single letters, especially initials
Monophobia		fear of being alone or being lonely
Mononucleosis		a single eyeglass
Monocle		a single-rail train