Crossword solverSynonyms for knapweed9 crossword answers for “knapweed” (8), sorted by letter count.How many letters?All981911321431511718 letters 1centaury9 letters 1hardheads13 letters 2black knapweed(5,8)great knapweed(5,8)14 letters 3Centaurea nigra(9,5)lesser knapweed(6,8)jersey knapweed(6,8)15 letters 1greater knapweed(7,8)17 letters 1centaurea scabiosa(9,8)