咳き払い[sekibarai] clearing one's throat
咳嗽[gaisou] coughing
百日咳[hyakunichizeki] whooping cough
謦咳[keigai] cough
空咳[karazeki] dry cough

咳止め[sekidome] cough medicine
謦咳に接する[keigainisessuru] to meet someone in person
咳き上げる[sekiageru] to have a coughing fit
咳込む[sekikomu] to cough violently