foo-foo footrot forroot fou-fou fourmor fourtou furrour futurum moo-moo morrum mortuum moumour moutrot muu-muu off-off offform ottrott outfoot outform outroom outroot roomfor rootfor rootout rootrot rototom rum-tum tom-tom too-too tortour tototoo toumour tro-tro trotoff trotout tum-tum tut-tut ufotofu ur-form