Synonyms of the word

occasional

• adj. Occurring or appearing irregularly from time to time.
• adj. Not very often.
• adj. Created for a specific occasion.
• adj. Intended for use as the occasion requires.
• adj. Acting in the indicated role from time to time.

casual

• adj. Happening by chance.
• adj. Coming without regularity; occasional or incidental.
• adj. Employed irregularly.
• adj. Careless.
• adj. Happening or coming to pass without design.
• adj. Informal, relaxed.
• adj. Designed for informal or everyday use.
• n. (Britain, Australia, New Zealand) A worker who is only working for a company occasionally, not as its…
• n. A soldier temporarily at a place of duty, usually en route to another place of duty.
• n. (Britain) A member of a group of football hooligans who wear expensive designer clothing to avoid police…
• n. One who receives relief for a night in a parish to which he does not belong; a vagrant.
• n. (video games, informal) A player of casual games.
• n. (dated) (Britain) A tramp.

episodic

• adj. relating to an episode.
• adj. sporadic, happening infrequently and irregularly.
• adj. (literature) made up a sequence of seemingly unconnected episodes.

infrequent

• adj. Not frequent; not happening frequently.

irregular

• adj. Nonstandard; not conforming to rules or expectations.
• adj. Of a surface, rough.
• adj. Without symmetry, regularity, or uniformity.
• adj. (geometry, of a polygon) Not regular; having sides that are not equal or angles that are not equal.
• adj. (geometry, of a polyhedron) Whose faces are not all regular polygons (or are not equally inclined to each…
• n. A soldier who is not a member of an official military force and, often, does not follow regular army tactics.
• n. One who does not regularly attend a venue.

unpredictable

• adj. Unable to be predicted.
• n. An unpredictable thing.