Rainbow and Wraith

Rainbow noun - An arc of colored light in the sky caused by refraction of the sun's rays by rain.

Wraith and rainbow are semantically related. In some cases you can use "Wraith" instead a noun "Rainbow".

Wraith noun - The soul of a dead person thought of especially as appearing to living people.

Rainbow and wraith are semantically related. Sometimes you can use "Rainbow" instead a noun "Wraith".