Safe to mass find and replace:

yze –> yse iza –> isa color –> colour honor –> honour maneuver –> manoeuvre armor –> armour favor –> favour travele –> travelle laborer –> labourer laborers –> labourers recognized –> recognised meager –> meagre caliber –> calibre

Check manually:

fulfill –> fulfil labor –> labour (watch out for inadvertently changing “elaborate” or “collaborate”) ize –> ise (watch out for inadvertently changing “seize”) izing –> ising (watch out for inadvertently changing “seizing”) fense –> fence eled –> elled vior –> viour center –> centre