rancour or US rancor /rangˈkər/

1. Harboured bitterness of mind, speech, etc
2. Deep-seated enmity
3. Spite
4. Virulence
5. Sourness (Shakespeare)

• sickishness
• sickishnesses
• sickle
• sick leave
• sicklebill
• sicklebills
• sickle-cell anaemia
• sickle-celled anaemia
• sickle-cell trait
• sickled
• sickle feather
• sickle feathers
• sickleman
• sicklemen
• sicklemia
• speak the same language
• speak to
• speak to the heart
• speak up
• speak volumes
• speal
• speals
• spean
• speaned
• speaning