ベトナム戦争[betonamusensou] Vietnam war
価格競争[kakakukyousou] price competition
価格戦争[kakakusensou] price war
階級闘争[kaikyuutousou] class struggle
核戦争[kakusensou] nuclear warfare

競争[kyousou] competition
競争関係[kyousoukankei] competitive relationship
競争市場[kyousoushijou] competitive market
競争売買[kyousoubaibai] auction
競争力[kyousouryoku] competitive power

いい年をして[iitoshiwoshite] (in spite of) being old enough to know better
亥年[idoshi] year of the boar
一箇年[ikkanen] one year
一周年[isshuunen] one full year
一年以内に[ichineninaini] within a year

一年間[ichinenkan] (period of) one year
一年生[ichinensei] annual (plant)
一年草[ichinensou] annual (plant)
一年ぢゅう[ichinenjuu] all year round
一両年[ichiryounen] (a) year or two