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

• Lexulous
• Wordscraper
• Wordosaur

n. the property of a more than adequate quantity or supply

"A copious teemingness of neat things to do in the off-hours."

quantity   

profuseness    profusion    plentifulness    voluptuousness    plenty    overabundance    bountifulness    plenitude    bounty    cornucopia   

seemingness