What is the plural of runner-up? Use a dictionary if necessary.

runners-up

runner-ups

both

Answer : Runners-up

The plural form of the word runner-up is runners-up. The plural form of a hyphenated compound word is done by pluralizing the main element of the word. If the main element of the word is not a known, the second element can be pluralized. However, in this case the first element is runner and that is noun meaning we pluralized the runner into runners making it "runners-up". Other examples of pluralized hyphenated compound word are fathers-in-law, lookers-on, editors-in-chief and a lot more.

If there are two words, then the first word would has a 's'.

Answer: Runners-up