一塁[ichirui] first base
一塁手[ichiruishu] first baseman
一塁線[ichiruisen] first-base line
堅塁[kenrui] stronghold
三塁[sanrui] third base

三塁手[sanruishu] third baseman
三塁線[sanruisen] third-base line
三塁打[sanruida] three-base hit
出塁[shutsurui] on base (baseball)

敵わない[kanawanai] no match for
怨敵[onteki] sworn enemy
外敵[gaiteki] foreign enemy
敵う[kanau] to come true (wish)
仇敵[kyuuteki] bitter enemy

敵討[katakiuchi] vengeance
敵同士[tekidoushi] mutual enemies
旧敵[kyuuteki] old enemy
強敵[kyouteki] formidable enemy
公敵[kouteki] public enemy