悍ましい[ozomashii] disgusting
兇悍[kyoukan] heinousness
剽悍[hyoukan] fierceness
勁悍[keikan] strong and fierce

悍馬[kanba] bronco
精悍[seikan] fearless
剽悍無比[hyoukanmuhi] as fierce and nimble as any

馬酔木[asebi] Japanese andromeda (Pieris japonica)
馬鈴薯[jagaimo] potato (Solanum tuberosum)
じゃじゃ馬[jajauma] restive horse
玖馬[kyuuba] Cuba
トロイの木馬[toroinomokuba] Trojan horse

巴奈馬[panama] Panama
馬克[maruku] mark
羅馬字[roomaji] Latin alphabet
ワープロ馬鹿[waapurobaka] someone whose kanji-writing ability has suffered due to overreliance on the kana-to-kanji conversion systems used to input Japanese text on a computer
愛馬[aiba] favourite horse