Cay or key?
cay is a noun meaning “A small, low island largely made of sand or coral”; key is a noun meaning “An object designed to open and close a lock or to activate or deactivate…”. They sound the same (/kiː/). In written English (wordfreq, 2021 data) key is about 245 times as common as cay.
What is the difference between cay and key?
| cay | key | |
|---|---|---|
| Part of speech | noun | noun, adjective, verb |
| Meaning | A small, low island largely made of sand or coral | An object designed to open and close a lock or to activate or deactivate something, especially a length of metal inserted into a narrow opening on the lock to… A card or fob that electronically signals a lock to open Indispensable, supremely important |
| Example | none recorded | This key is to the backdoor |
| Forms | cays, cayes cays | keys |
| Pronunciation | /kiː/ /keɪ/ | /kiː/ /ki/ |
| In writing | about once in every 2 million words | 132 times per million words |
Sources: cay and key in the English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0); written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
Every current meaning of cay and key
cay
- 1
A small, low island largely made of sand or coral
key
- 1
An object designed to open and close a lock or to activate or deactivate something, especially a length of metal inserted into a narrow opening on the lock to which it is matched (keyed)
This key is to the backdoor
- 2
Indispensable, supremely important
He is the key player on his soccer team
- 3
To fit (a lock) with a key
- 4
One of a string of small islands
the Florida Keys
- 5
slangA kilogram, especially of a recreational drug
- 6
Alternative form of quay
- 7
A key position player (a tall forward or defender)
- 8
A card or fob that electronically signals a lock to open
My hotel room key is a card
Source: the English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0); obsolete, archaic, dialect and rare senses left out.
Which is more common, cay or key?
cay appears about once in every 2 million words; key 132 times per million words.
cay about once in every 2 million wordskey 132 times per million words
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
How many people search cay vs key?
“cay vs key” is searched about 320 times a month on Google and 20 on Bing in the United States. Google counts close variants of a query together (“key vs cay”, “cay or key”).
Sources: Google Ads keyword data through DataForSEO and Microsoft Advertising keyword data through DataForSEO, the average month from September 2025 to August 2026.