1. A bow, or an arc of a circle, consisting of all the prismatic colours, produced in the atmosphere by the refraction and reflection of the sun's light from the rain drops, and appearing in the quarter opposite the sun. Lunar rainbow, a phenomenon similar to the rainbow, but produced by the moon.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• ranbow,
• raindbow,
• ranbom,
• rianbow,
• rainboe,
• raibow,
• chainbow,
• rinbow,
• ranibow,
• raindow,
• randow,
• rambow,
• rainbox,
• raminbow,
• raiinbows,
• eainbow,
• dainbow,
• fainbow,
• tainbow,
• 5ainbow

• rainbow-hued,
• rainbowy,
• runup,
• RNAPIII,
• Rainbeaux,
• rainbow-colored,
• RENAP,
• wrenboy,
• rehnab,
• ranby,
• RNIB,
• RNAAPP,
• RNP-AB,
• rainbow-coloured,
• RANB.BO,
• RNAP-D,
• RNAP,
• rainbo,
• Rainbow-tinted,
• RNB,
• VP-RNP,
• ALPHA-RANP-LI,
• RNPY,
• RNBW,
• rainbow-like,
• SM/RNP,
• RNBO,
• RNUP,
• rainbow-wrasse,
• RAMBO,
• RUNHP,
• RANBBO,
• RNAAP,
• ronneby,
• RHNPA,
• RNAIP,
• renob,
• RANPA,
• U1-RNP,
• run up,
• RNAP-I,
• Rainbeau,
• RNP-RNAV,
• RONIEP,
• RNP-10,
• RNAPII,
• RNAPI,
• runby,
• RNIPP,
• RNP,
• RNAP-C,
• RGNB.

The adjective form of the word "rainbow" is "rainbow-colored" or simply "rainbow".

The plural of the "rainbow" can be the "rainbows".

The singular of the "rainbow" can be the "rainbow".