Synonyms of the word

unexpected

• adj. Not expected, anticipated or foreseen.

forced

• v. simple past tense and past participle of force.
• adj. Obtained forcefully, not naturally.
• adj. Opened or accessed using force.

sudden

• adj. Happening quickly and with little or no warning.
• adj. (obsolete) Hastily prepared or employed; quick; rapid.
• adj. (obsolete) Hasty; violent; rash; precipitate.
• adv. (poetic) Suddenly.
• n. (obsolete) An unexpected occurrence; a surprise.

surprising

• v. present participle of surprise.
• adj. That is or are a surprise.
• n. A situation in which somebody is surprised.

unannounced

• adj. Not announced beforehand.

unanticipated

• adj. Not anticipated.

unforeseen

• adj. Not foreseen.
• adj. Not expected.
• n. An event, incident, cost, etc. that was not foreseen.

unheralded

• adj. Without prior warning; unexpected or unannounced.
• adj. Not heralded.

unhoped

• adj. Not hoped for; unexpected.

unhoped-for

• adj. Not expected or imagined.

unlooked-for

• adj. Alternative form of unlooked for.

unplanned

• adj. unintentional; not intended.
• adj. spontaneous and not thought through in advance.
• adj. not having any structure or organization.

unpredicted

• adj. Not predicted.
• v. simple past tense and past participle of unpredict.

unscheduled

• adj. Not scheduled; impromptu.

unthought

• n. That which has not been (yet) thought; that which has yet to enter into the mind; a non-existent thought.
• v. simple past tense and past participle of unthink.
• adj. Not having been thought.

unthought-of

• adj. unexpected.
• adj. unimagined.

upset

• adj. (of a person) Angry, distressed, or unhappy.
• adj. (of a stomach or gastrointestinal tract, referred to as stomach) Feeling unwell, nauseated, or ready to…
• n. (uncountable) Disturbance or disruption.
• n. (countable, sports, politics) An unexpected victory of a competitor or candidate that was not favored…
• n. (automobile insurance) An overturn.
• n. An upset stomach.
• n. (mathematics) An upper set; a subset (X,≤) of a partially ordered set with the property that, if x is…
• v. (transitive) To make (a person) angry, distressed, or unhappy.
• v. (transitive) To disturb, disrupt or adversely alter (something).
• v. (transitive) To tip or overturn (something).
• v. (transitive) To defeat unexpectedly.
• v. (intransitive) To be upset or knocked over.
• v. (obsolete) To set up; to put upright.
• v. To thicken and shorten, as a heated piece of iron, by hammering on the end.
• v. To shorten (a tire) in the process of resetting, originally by cutting it and hammering on the ends.