That may be ordered (obtained by placing an order).(adjective)
That may be ordered (put in sequence).(adjective)
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Use "orderable" in a sentence
"Perhaps a certain novel might have a pre orderable special edition with artwork?"
"Skewing towards Italian vinos, the wine program even boasts 100+ bottles orderable by the half (with the leftovers avail to guests by the glass), a method known as the "half-bottle approach" that spares anyone from having to go to the Temple of the Dog to get its hair."
"View settings with chosen and re-orderable columns would be handy."