The noun phenomena means a classical plural of phenomenon.

Synonyms are experience, phantasm, development, or wonder.

The word is a classical plural of phenomenon, from the Late Latin phænomenon and Greek phainomenon meaning “that which appears or is seen”, noun use of neuter present participle of phainesthai meaning “to appear”, passive of phainein meaning “bring to light, cause to appear, show”. Sometimes it is also erroneously used as a singular.

There are places that attract paranormal phenomena.

That’s an unusual phenomena.

There were some basic psychological phenomena that she wasn’t able to handle well.