Difference among plenty of , a lot (lots) of , numerous, a number of ,a great many of ... Where in different descriptions of many context, we would like to say " plenty of/ lots of " following nouns, same using in "a great many of". As known that there are also various "Quantitative" adj/adv appearing with those countable nouns like "a great many of". But is there any difference or particular using? Thank you for share!