federalizable

Etymology tree
Proto-Indo-European *bʰeydʰ-
Proto-Indo-European *-ós
Proto-Indo-European *bʰeydʰós
Proto-Italic *feiðos
Latin foedusder.
French fédéralder.
English federal
Proto-Indo-European *-id-
Proto-Indo-European *-yéti
Proto-Indo-European *-idyéti
Proto-Hellenic *-íďďō
Ancient Greek -ῐ́ζω (-ĭ́zō)bor.
Late Latin -izōder.
Middle French -iserbor.
Middle English -isen
English -ize
English federalize
Proto-Indo-European *-tḗr
Proto-Indo-European *-dʰlom
Proto-Indo-European *-dʰlis
Proto-Italic *-ðlis
Latin -bilis
Latin -ābilis
Old French -ablebor.
Middle English -able
English -able
English federalizable
From federalize + -able.