139 entries under noun topic. ×

42
spectrum(colour, color, tone, spectrum)
31
dream(desire, fancy, idea, impression)
18
illusion(desire, fancy, informal, idea)
15
fantasy(desire, fancy, confusion, informal)
14
variegation(arch, spectrum, iridescence)
12
iris(colour, tone, spectrum)
11
mirage(desire, fancy, confusion, deception)
10
aura(energy, field, emanation)
10
iridescence(colour, tone, spectrum)
10
color spectrum(expression, colour, tone, arch)
10
gradation(colour, tone, spectrum)
10
light(colour, tone, spectrum)
9
nimbus(aura, halo, aureole)
9
impression(fancy, idea, deception, vision)
7
optical illusion(expression, confusion, deception, impression)
5
chameleon(terrain, reptile, lizard)
5
hallucination(desire, fancy, confusion, idea)
5
air castle(expression, desire, fancy, hope)
5
band of color(expression, idiom, colour, tone)
5
beam(gleam, glare, glitter)
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APASmart Define. (2016). rainbow thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/rainbow/thesaurus/synonyms
ChicagoSmart Define. 2016. "rainbow thesaurus" https://smartdefine.org/rainbow/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, rainbow thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/rainbow/thesaurus/synonyms>.
MLASmart Define. "rainbow thesaurus" 25 February 2016. Web. 25 September 2026. <https://smartdefine.org/rainbow/thesaurus/synonyms>