Synonyms for Unstructured:

adj.

unorganized (adjective)
disorganized, unregulated, disorderly.

n.

haphazard, undisciplined, all over the place, chaotic, hit-and-miss, hasty, unplanned, uncoordinated. unorganized (noun)
disorderly, disorganized, confused.
unstructured (noun)
inorganic, unregulated, amorphous, ambiguous.

Other synonyms:

haphazard, hasty, undisciplined, chaotic, hit-and-miss. uncoordinated, unplanned, disorganized. Other relevant words:
chaotic, uncoordinated, haphazard, undisciplined, disorderly, confused, disorganized, unplanned, hasty, hit-and-miss.