pentalogy /pen-talˈə-ji/

1. A pentad, esp of published works
2. A series of five related books

• irrelations
• irrelative
• irrelatively
• irrelativeness
• irrelativenesses
• irrelevance
• irrelevances
• irrelevancies
• irrelevancy
• irrelevant
• irrelevantly
• irreligion
• irreligionist
• irreligionists
• irreligions
• irreligious
• irreligiously
• irreligiousness
• irreligiousnesses
• irremeable
• irremeably
• irremediable
• irremediableness
• irremediably
• irremissibilities