Synonyms:
2. plenteousness, copiousness, luxuriance, affluence. Plenty, abundance, profusion refer to a large quantity or supply. Plenty suggests a supply that is fully adequate to any demands: plenty of money. Abundance implies a great plenty, an ample and generous oversupply: an abundance of rain. Profusion applies to such a lavish and excessive abundance as often suggests extravagance or prodigality: luxuries in great profusion.

Usage note:
The construction plenty of is standard in all varieties of speech and writing: plenty of room in the shed. The use of plenty preceding a noun, without an intervening of, first appeared in the late 19th century: plenty room in the shed. It occurs today chiefly in informal speech. As an adverb, a use first recorded in the mid-19th century, plenty is also informal and is found chiefly in speech or written representations of speech.