coop

In English, “coop” and “co-op” look similar but point to different ideas. “Coop” originally means an enclosure for poultry—especially chickens. Picture a rustic wooden structure in a farmyard; that's a classic chicken coop, providing shelter and security for the birds. A typical use would be: "The farmer built a new coop to protect his hens from foxes." In this sense, it functions as both a noun (the cage) and a verb (to coop something up), meaning to confine or shut someone or something in a small space.

However, there’s a second word that looks similar: “co-op,” a shortened form of “cooperative”—an organization or enterprise owned and run jointly by its members. This could be anything from a housing co-op (where residents collectively own their building) to a food co-op (where members share in buying and distributing groceries). In these instances, you will often see the hyphen (“co-op”) to help distinguish it from the chicken’s home.

Despite the look-alike spelling, these two uses don’t come from the same source: “coop” (the enclosure) comes from an older word meaning “cage,” while “co-op” is simply an abbreviation of “cooperative.” They also sound different. The chicken coop is /kuːp/ (like “hoop”), while “co-op” is two syllables, often /koʊˌɑp/ in American English.