chimerical

not real and existing only in the imagination for the time being, interplanetary travel remains a chimerical feature of life in the 21st century Synonyms imaginary (also chimeric), fabulous, fanciful, fantasied, fantastic (also fantastical), fictional, fictitious, ideal, imaginal, imagined, invented, made-up, make-believe, mythical (or mythic), notional, phantasmal, phantasmic, phantom, pretend, unreal, visonaryRelated Words fabled, legendary, romantic; abstract, hypothetical, theoretical (also theoretic); unbelievable, unconvincing, unlikely; conceived, envisaged, envisioned, pictured, visualized; daydreamlike, deceptive, delusional, delusive, hallucinatory, illusory, phantasmagoric (or phantasmagorical); concocted, fabricated, feigned, fictive; inexistent, nonexistentNear Antonyms authentic, genuine, true; factual, verifiable, verified; believable, convincing, realistic; corporeal, material, physical, solid, substantial; palpable, tangibleAntonyms actual, existent, existing, real