Here's what rhymes with preferable.

Consider these alternatives

feasible / appreciable palatable / charitable expedient / obedient unwise / size impractical / practical unpalatable / charitable alternative / affirmative desirable / undesirable counterproductive / productive agreeable / disagreeable unavoidable / avoidable likeliest / unlikeliest prefer / her cheaper / teacher unappealing / feeling problematic / dramatic entail / male reasonable / treasonable recourse / recalls worthwhile / while prudent / student