hardheads hardheadedness • hardhearted · · · Info · Definitions · Synonyms · Characters · · hardheads · · Text Latin · · Script 9 · · Length 2 · · Syllables Definitions · · · (noun) a weedy perennial with tough wiry stems and purple flowers; native to Europe but widely naturalized. Synonyms: lesser knapweed, black knapweed, Centaurea nigra. · · Noun Definition 1 Synonyms · · · lesser knapweed · · Synonym 1 black knapweed · · Synonym 2 centaurea nigra · · Synonym 3 Characters · · a latin small letter a U+0061 d latin small letter d U+0064 e latin small letter e U+0065 h latin small letter h U+0068 r latin small letter r U+0072 s latin small letter s U+0073