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

• rubricated
• rubricates
• rubricating
• rubrication
• rubrications
• rubricator
• rubricators
• rubrician
• rubricians
• rubrics
• rubs
• rub salt in a wound
• rub shoulders
• rub someone's nose in it
• rubstone
• rubstones
• rub the wrong way
• rub up
• rub up the wrong way
• Rubus
• ruby
• ruby-coloured
• ruby glass
• rubying
• ruby-red