attainable(able to be accomplished, achieved, or obtained) adjective [UK: ə.ˈteɪ.nəb.l̩] [US: ə.ˈteɪ.nəb.l̩]
feasible(that can be done in practice) adjective [UK: ˈfiː.zəb.l̩] [US: ˈfiː.zəb.l̩]His plan seemed to be too difficult, but before long it proved to be feasible. = Su plan parecía ser demasiado difícil, pero no después de mucho se vio que era realizable.
practicable(capable of being accomplished; feasible) adjective [UK: ˈpræk.tɪk.əb.l̩] [US: ˈpræk.tək.əb.l̩]