Is “Rainbow” a Scrabble word?
Yes
RAINBOW
Valid in at least one Scrabble dictionary
Valid in these dictionaries
SOWPODS / CSW
Scrabble UK & International
TWL / NWL
Scrabble North America
Large English Dictionary
General English word list
Meaning of Rainbow
/ˈɹeɪnbəʊ/
noun
1.A multicoloured arch in the sky, produced by prismatic refraction of light within droplets of rain in the air.
2.Any prismatic refraction of light showing a spectrum of colours.
3.(often used with “of”) A wide assortment; a varied multitude.
“a rainbow of possibilities”
Synonyms: spectrum
verb
1.To brighten with, or as with, a rainbow; to pattern with the colours of the rainbow.
2.To take the appearance of a rainbow.
adjective
1.Multicolored.
2.Made up of several races or ethnicities, or (more broadly) of several cultural or ideological factions.
3.LGBT.
Synonyms: multipartisan, multiethnic, multiracial, rainbowed, motley, multihued