IPA: /ˈreɪsˌɡoʊər/
KK: /ˈreɪsˌɡoʊər/
A person who goes to watch horse races or other types of races, often regularly.
The racegoer cheered loudly as the horses approached the finish line.
Racegoer → It is formed from "race" (from Old French *racier*, meaning a contest of speed) and "goer" (meaning a person who goes). A racegoer is a person who goes to watch or participate in a race.
Think of someone who 'goes' to watch a 'race' — that's what a racegoer does.
No commonly confused words.