FANTASTICAL
antic, fantastic, fantastical, grotesque
(adjective) ludicrously odd; “Hamlet’s assumed antic disposition”; “fantastic Halloween costumes”; “a grotesque reflection in the mirror”
fantastic, fantastical
(adjective) existing in fancy only; “fantastic figures with bulbous heads the circumference of a bushel”- Nathaniel Hawthorne
Source: WordNet® 3.1
Etymology
Adjective
fantastical (comparative more fantastical, superlative most fantastical)
Of or pertaining to fantasy.
Fanciful or whimsical.
Fantastic.
Source: Wiktionary
Fan*tas"tic*al, a.
Definition: Fanciful; unreal; whimsical; capricious; fantastic.
Source: Webster’s Unabridged Dictionary 1913 Edition