Synonyms for Unanticipated:
adj.
•abrupt (adjective)sudden, unexpected, unforeseen, surprising.
•surprising (adjective)
astounding, surprising, startling, sudden, astonishing, unexpected, shocking, out of the blue, unforeseen.
•unexpected (adjective)
unlooked-for.
adv
•unpredicted (adverb)out of the blue.
n.
•unanticipated (noun)out of the blue, unforeseen, unlooked-for, unexpected.
Other synonyms:
•Other relevant words:
unlooked-for, out of the blue.