Synonyms of the word

unintended

• adj. Not intended; unplanned.

accidental

• adj. Not essential; incidental, secondary.
• adj. (philosophy) Nonessential to something's inherent nature (especially in Aristotelian thought).
• adj. (music) Adjusted by one or two semitones, in temporary departure from the key signature.
• adj. Occurring sometimes, by chance; occasional.
• adj. Happening by chance, or unexpectedly; taking place not according to the usual course of things; by accident,…
• adj. (geometry) Being a double point with two distinct tangent planes in 4-dimensional projective space.
• n. A property which is not essential; a nonessential; anything happening accidentally.
• n. (painting, plural only) Those fortuitous effects produced by luminous rays falling on certain objects…
• n. (music) A sharp, flat, or natural, occurring not at the commencement of a piece of music as the signature,…

causeless

• adj. Having no obvious cause; fortuitous or inexplicable.
• adj. groundless or unreasonable.

fortuitous

• adj. Happening by chance; coincidental or accidental.
• adj. Happening by a lucky chance; lucky or fortunate.
• adj. (law) Happening independently of human will.

inadvertent

• adj. not intentional; not on purpose; not conscious.

uncaused

• adj. spontaneous, unintended and uninitiated.

unintentional

• adj. Not intended or deliberate; inadvertent; unwitting.

unmotivated

• adj. Lacking motivation, without impetus to strive or excel.

unplanned

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

unwitting

• adj. unaware or uninformed; oblivious.
• adj. unintentional.