The Collaborative International Dictionary of English v.0.48:

Recommendable \Rec`om*mend"a*ble\ (-?*b'l), a. [Cf. F.
   recommandable.]
   Suitable to be recommended; worthy of praise; commendable.
   --Glanvill. -- Rec`om*mend"a*ble*ness, n. --
   Rec`om*mend"a*bly, adv.
   [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

36 Moby Thesaurus words for "recommendable":
   advantageous, advisable, appropriate, becoming, befitting,
   congruous, convenient, decent, desirable, expedient, favorable,
   feasible, felicitous, fit, fitten, fitting, fructuous, good, happy,
   likely, meet, opportune, politic, profitable, proper, right,
   seasonable, seemly, sortable, suitable, timely, to be desired,
   useful, well-timed, wise, worthwhile