The American spelling variant of fertilisability; the quality or capacity of being able to be fertilized.
From fertilize (American spelling of fertilise) + -able + -ity. The '-iz-' spelling reflects American English convention influenced by Greek roots rather than French.
This word perfectly captures the American vs. British spelling divide—same meaning, different spelling philosophy, a remnant of how American lexicographers chose Greek routes while British ones preferred French routes.
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