(archaic) Short for と言う (to iu):

豪州: (country) Australia / 濠洲: (country) Australia

口中: interior of the mouth / 甲虫: beetle (read as かぶとむし in common) / 鈎虫, 鉤虫: hookworm / 校注, 校註: proofreading and annotation / 航宙: space flight / 鉱柱: rib, pillar

加入: becoming a member of a group / 加入: subscribing, or making affiliation with

介入: intervention

購入: purchase or buy

悟入: entering a stage of enlightenment (such as with Buddhism)

混入: the act of mixing; the state of being mixed; a mixing or mingling of two or more things, typically in an undesirable way

混入: to mix one thing into another, typically in an undesirable way; to mingle, to become mixed, to get mixed, typically in an undesirable way

歳入: : annual income or revenue