Quick Quiz: Nouns Score: Change category, Flip order Reset Incorrect! Try again. Noun: planthopper Your choice? related to the leafhoppers and spittlebugs but rarely damages cultivated plants a mixture of lime or gypsum with sand and water; hardens into a smooth solid; used to cover walls and ceilings of central North America; a threatened species   (Noun: platanthera leucophea) the flat plate of a printing press that presses the paper against the type