uncompromising vs unreconcilable

uncompromising

adj

  • Inflexible and unwilling to negotiate or make concessions. 

  • Principled. 

unreconcilable

adj

  • Irreconcilable. 

noun

  • A person or thing that cannot be reconciled. 

How often have the words uncompromising and unreconcilable occurred in a corpus of books? (source: Google Ngram Viewer )