* A misspelling: It might be a misspelling of another word, such as "orna" for "ornaments", "ornaments" for "ornamental", or "orna" for "ornaments" (a shortened form).
* A proper noun: It could be a person's name, a place name, or a brand name.
* A foreign word: It might be a word from another language.
Without further context, it's impossible to determine what "orna" refers to.
As for a suffix, "orna" is not a recognized suffix in English.