Synonyms of the word 
UNLIFELIKE → ARTIFICIAL - CARDBOARD - UNREAL
unlifelike
- adj. Not lifelike.
artificial
- adj. Man-made; of artifice.
- adj. False, misleading.
- adj. Unnatural.
cardboard
- n. A wood-based material resembling heavy paper, used in the manufacture of boxes, cartons and signs.
- adj. Made of or resembling cardboard; (figuratively) flat or flavorless.
unreal
- adj. fake; not real.
- adj. (slang) larger or more fantastic than typical of real life.
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