temporary

(noun) a worker (especially in an office) hired on a temporary basis. Synonyms: temp, temporary worker.

(adj) not permanent; not lasting. Synonyms: impermanent (vs. permanent). Examples: "Politics is an impermanent factor of life"- james thurber." "Impermanent palm cottages." "A temperary arrangement." "Temporary housing."

(adj) lacking continuity or regularity. Synonyms: irregular. Examples: "An irregular worker." "Employed on a temporary basis."