1. Antonyms for Achievability include impossibility, impracticability, unfeasibility, unlikelihood, implausibility, inconceivability, impracticality, ridiculousness

2. No need for anyone to point out the unlikelihood of such a slew of benign effects occurring the same week.

3. ‘His Actorly slam-dunk is equalled, however, by half-lidded ingenue Scarlett Johansson, whose sheer unlikelihood as a romantic foil paradoxically renders her perfect.’ ‘His performance skills are less obtrusive than those of his Actorly predecessors simply because we are already familiar with the style.’