curtain n. hanging piece of fabric - from French cortine (Modern French courtine)
cushion n. pillow - from Old French coissin (Modern French coussin)
duty n. obligation - from Anglo-French deweté
due to prep. caused by - from French du(e) past p. of devoir (to owe)
flower n. blossom - from Old French flor, flour (Modern French fleur)
leisure n. freedom from business - from Old French leisir (Modern French loisir)
mean n. method/instrument used to attain an end - something intermediate - from Old French meien (Modern French moyen)
oil n. viscous liquid - from Old French oile (Modern French huile)
oyster n. molluscs - from Old French oistre, uistre (Modern French huître)
obey v. to perform a command - from Old French obéir
pace n. a step, a rate of movement - from Old French pas (step)
pain n. suffering - from Old French peine (Modern French peine sorrow)
pants n. trousers - abbrev. of pantaloons - from French pantalon (trousers)
paper n. wood pulpe - from Old French papier < from Latin papyrus (Cassell's Dictionary of Wordhistories)
rhyme n. verse - variation of Old French rime < Latin rythmus
rice n. plant/grains - from Old French ris (Modern French riz) < from Italian < from Latin
riot n. outbreak of lawlessness - from Old French riote (rihot(t)er to quarrel)
scaffold n. temporary structure - from Old French eschaffaut (Modern French échafaud)