Verbs ending in -ize, -ise, -yze, and -yse
Many verbs that end in -ize in American English can also end in -ise in British English. For example, in British English, all of the following spellings are acceptable: finalize/finalise; organize/organise; realize/realise. In American English, the only correct spellings are finalize, organize, and realize.
prise (meaning ‘open’)