Viable(a.) Capable of living; born alive and with such form and development of organs as to be capable of living; -- said of a newborn, or a prematurely born, infant.
Thesaurus Entries
OK, aboveground, acceptable, achievable, actable, activating, admissible, agreeable, alive, alive and kicking, all right, alright, among the living, animate, animated, animating, animative, applicable, attainable, bracing, breathing, capable of life, compassable, conscious, doable, endowed with life, energizing, enlivened, enlivening, exhilarating, exhilarative, existent, feasible, good enough, in the flesh, inspirited, instinct with life, invigorating, invigorative, live, living, long-lived, manageable, maneuverable, manipulatable, negotiable, of concern, of concernment, of consequence, of interest, of moment, of note, of significance, of weight, okay, operable, operatable, overcomable, passable, performable, possible, practicable, practical, quick, quickening, realizable, reasonable, rousing, sensible, stimulating, stimulative, superable, supportable, surmountable, sustainable, tenable, tenacious of life, tonic, unexceptionable, unobjectionable, very much alive, vital, vitalizing, vivified, workable, zoetic