pentad /penˈtad/

1. A set of five things
2. A period of five years or five days
3. An atom, element or radical with a combining power of five

pentadˈic adjective

• meaninglessness
• meaningly
• meanings
• mean lethal dose
• mean lethal doses
• meanly
• meanness
• meannesses
• means
• mean sea level
• mean solar time
• mean-spirited
• mean-spiritedness
• means test
• means-test
• means-tested
• means-testing
• means tests
• means-tests
• mean sun
• mean suns
• meant
• mean time
• meantime
• meantimes