rancour or US rancor /rangˈkər/

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

ranˈcorous adjective

ranˈcorously adverb

• bookend
• bookended
• bookending
• bookends
• booker
• bookers
• bookful
• book group
• book groups
• book-hand
• book-hands
• book-holder
• book-holders
• bookie
• bookier
• bookies
• bookiest
• book in
• booking
• booking clerk
• booking clerks
• booking hall
• booking halls
• booking office
• booking offices