achromatic
['argent ', 'silver ', 'silvery ', 'silverish ', 'ashgrey ', 'ashgray ', 'ashy ', 'blackish ', 'blackgrey ', 'blackgray ', 'blackishgrey ', 'blackishgray ', 'bluewhite ', 'bluishwhite ', 'coolwhite ', 'bluegrey ', 'bluegray ', 'bluishgrey ', 'bluishgray ', 'blueblack ', 'bluish black ', 'brownblack ', 'brownishblack ', 'browngrey ', 'browngray ', 'brownishgrey ', 'brownishgray ', 'canescent ', 'chalky ', 'charcoal ', 'charcoalgrey ', 'charcoalgray ', 'coalblack ', 'jet ', 'jetblack ', 'pitchy ', 'sooty ', 'cottonywhite ', 'dullwhite ', 'ebon ', 'ebony ', 'grey ', 'gray ', 'greyish ', 'grayish ', 'greyblack ', 'grayblack ', 'greyishblack ', 'grayishblack ', 'greywhite ', 'graywhite ', 'greyishwhite ', 'grayishwhite ', 'greenishgrey ', 'greenishgray ', 'greenwhite ', 'greenishwhite ', 'hueless ', 'inkblack ', 'inky ', 'inkyblack ', 'irongrey ', 'irongray ', 'lilywhite ', 'milkwhite ', 'olivegrey ', 'olivegray ', 'oxfordgrey ', 'oxfordgray ', 'darkgrey ', 'darkgray ', 'neutral ', 'pearl grey ', 'pearl gray ', 'pearly ', 'pearlywhite ', 'pinkishwhite ', 'purpleblack ', 'purplishblack ', 'purplewhite ', 'purplishwhite ', 'redgrey ', 'redgray ', 'reddishgrey ', 'reddishgray ', 'sable ', 'silvergrey ', 'silvergray ', 'silverygrey ', 'silverygray ', 'silverwhite ', 'silverywhite ', 'slateblack ', 'slategrey ', 'slategray ', 'slatygrey ', 'slatygray ', 'slaty ', 'slatey ', 'stonegrey ', 'stonegray ', 'snowwhite ', 'snowy ', 'sootblack ', 'sootyblack ', 'violetblack ', 'whiteflowered ', 'whitish ', 'offwhite ', 'yellowgrey ', 'yellowgray ', 'yellowishgrey ', 'yellowishgray ', 'yellowwhite ', 'yellowishwhite ', 'colorless ', 'colourless ', 'chromatic ']