This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

v. Simple past tense and past participle of neologize.

"Schott describes his blog as "a repository of unconsidered lexicographical trifles -- some serious, others frivolous, some neologized, others newly newsworthy.""

neologized    neologizing