Cluster and congregate both bring many together, with a difference in what and how tightly. Cluster is to gather into a tight, dense bunch, of things or people, held by nearness. Congregate is for people to come together in a crowd, usually of their own accord. Cluster packs things or people densely close; congregate gathers people into a crowd.
Both crowd many together, but cluster is a tight dense bunch and congregate a gathering crowd of people. Cluster gathers things or people into a tight knot where each stays itself, held by nearness — grapes, stars, a knot of fans. Congregate, from gregare 'to collect into a flock', describes people gathering into a crowd of their own accord. Fans cluster tightly at the door; worshippers congregate in the hall. One stresses dense closeness; the other a crowd of people forming.
cluster
A cluster is a group of things packed closely together — a cluster of grapes, of stars, of houses — and to cluster is for them to gather into such a tight bunch. From the Old English clyster, an old word for a bunch or branch of things growing together, a bunch of grapes being the classic image. What defines a cluster is not a boundary but density: the members crowd near one another, closer than to anything outside. The word stretches from the spatial (stars cluster) to the temporal (a cluster of events) and the technical (a cluster of data points).
congregate
To congregate is for many people or animals to come together into a crowd in one place — usually of their own accord, and often for a shared purpose. From the Latin con- 'together' and grex, greg- 'flock' (the same root as gregarious and segregate). Students congregate in the courtyard; starlings congregate at dusk; protesters congregate in the square. It is intransitive — a crowd congregates on its own — and close to gather, but with a stronger sense of a mass assembling in one spot.
| cluster | congregate | |
|---|---|---|
| Meaning | gather into a tight, dense bunch | come together in a crowd, of one's accord |
| Of what | things or people | usually people (or animals) |
| Stresses | dense, tight closeness | a crowd forming spontaneously |
| Often with | grapes, stars, houses, fans | crowds, worshippers, birds |
| Noun | a cluster / clustering | congregation |
| Example | The stars cluster. | People congregate here. |
Ask whether the stress is on dense closeness or a crowd forming. Cluster packs things or people into a tight, dense knot by nearness — grapes crammed on a stem. Congregate is people gathering into a crowd of their own accord — a square filling. If things pack tightly close, that is cluster; if people gather into a crowd on their own, they congregate.
cluster
- iThe houses cluster along the sheltered hillside.
- iiFans clustered tightly around the stage door.
- iiiThe islands cluster near the mainland.
congregate
- iCrowds congregate in the square every evening.
- iiSwallows congregate on the wires before migrating.
- iiiStudents congregated outside the exam hall.
Cluster stresses dense, tight closeness and works for things (stars, houses) as well as people; congregate is almost always people gathering into a crowd of their own accord. A crowd can both congregate (form) and cluster (pack tightly around one spot), but cluster is about density and congregate about the crowd's forming.