ionium /ī-ōˈni-əm/

A radioactive isotope of thorium

• man of letters
• man of skill
• man of straw
• man of the cloth
• man of the match
• man of the moment
• man of the world
• man-of-war
• man-of-war bird
• man-of-war birds
• man-of-war's-man
• manometer
• manometers
• manometric
• manometrical
• manometries
• manometry
• ma non troppo
• manor
• man-orchid
• man-orchids
• manor-house
• manor-houses
• manorial
• manors