phenomena / phenomenon
The plural versus the singular.
One is a phenomenon. More than one are phenomena. Do not use a phenomena.
Examples
Use The delay is a phenomenon.
Use The delays are phenomena.
Avoid The delay is a phenomena.
The plural versus the singular.
One is a phenomenon. More than one are phenomena. Do not use a phenomena.
Use The delay is a phenomenon.
Use The delays are phenomena.
Avoid The delay is a phenomena.