orange vs orangish

orange is a noun but orangish is not a noun.

Word	Noun	Adjective	Verb	Adverb
orange	Yes	Yes	No	No
orangish	No	Yes	No	No

As adjectives, orange and orangish are synonyms defined as:

orange and orangish: of the color between red and yellow; similar to the color of a ripe orange

orange (noun)	orangish (noun)
orange color or pigment; any of a range of colors between red and yellow
round yellow to orange fruit of any of several citrus trees
any citrus tree bearing oranges
any pigment producing the orange color

orange (adjective)	orangish (adjective)
of the color between red and yellow; similar to the color of a ripe orange	of the color between red and yellow; similar to the color of a ripe orange