The term 'rainbow-like' can be described by two crossword solutions: ARCED (5 letters) and IRIDESCENT (10 letters). ARCED means curved or bent in a shape resembling an arch, while IRIDESCENT is a type of light reflection that creates a rainbow-like effect. This effect is caused by the refraction of light off of a surface, resulting in a spectrum of colors. Iridescence is often seen in soap bubbles, oil slicks, and certain types of minerals.