rationalisation

From French rationalisation, equivalent to rational +‎ -isation or rationalise +‎ -ation.

rationalisation (countable and uncountable, plural rationalisations)

1. (British spelling) alternative spelling of rationalization
   • 2020 December 2, Paul Bigland, “My weirdest and wackiest Rover yet”, in Rail, page 67:

     My trip along the rest of the line is delightful. It's yet another route that has recovered from previous rationalisation by having tracks and platforms reinstated in recent years.

From rationaliser +‎ -ation.

• IPA^(key): /ʁa.sjɔ.na.li.za.sjɔ̃/

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rationalisation f (plural rationalisations)

1. rationalisation

• “rationalisation”, in Trésor de la langue française informatisé [Digitized Treasury of the French Language], 2012.