サンプリング周波数[sanpuringushuuhasuu] sampling frequency
一周忌[isshuuki] first anniversary of death
一周期[isshuuki] period (in astronomy)
一周年[isshuunen] one full year
円周[enshuu] circumference

円周率[enshuuritsu] Pi (3.1415926..)
外周[gaishuu] outer circumference
基本周波数[kihonshuuhasuu] fundamental frequency
月経周期[gekkeishuuki] menstrual cycle
周章てる[awateru] to become confused (disconcerted, disorganized, disorganised)

狼狽える[urotaeru] to be flustered
餓狼[garou] hungry wolf
周章狼狽[shuushouroubai] consternation
送り狼[okuriookami] "gentleman" who escorts a woman home, only to make a pass at her
天狼星[tenrousei] Sirius (star in the constellation Canis Major)

落花狼藉[rakkarouzeki] running amok (amuck)
狼烟[houka] beacon
狼狽[roubai] confusion
狼藉[rouzeki] violence

狼狽える[urotaeru] to be flustered
周章狼狽[shuushouroubai] consternation

狼狽[roubai] confusion
狼狽気味[roubaigimi] being rather confused

印章[inshou] stamp
階級章[kaikyuushou] rank insignia
楽章[gakushou] (musical) movement
徽章[kishou] medal
旧章[kyuushou] ancient laws

勲章[kunshou] decoration
憲章[kenshou] charter
肩章[kenshou] shoulder strap
周章てる[awateru] to become confused (disconcerted, disorganized, disorganised)
校章[koushou] school badge