異教徒|いきょうとikyouto[2]nakadaka (mid-high)

1. nounpagan; heretic; heathen

• Related異端者いたんしゃWrittenA formal written term for a believer of ideas branded heretical within a faith, or a rebel against the mainstream; 「異教徒」 just means a believer of a different religion.
• Related異端派WrittenA formal written term for a heretical faction within a religion or school of thought; it names a group, not an individual, so it can't replace 「異教徒」.
• Antonym同教徒WrittenA formal written term for a believer of the same religion; the direct opposite of 「異教徒」.

Use 「異教徒」 for a believer of a religion other than one's own. 「異端者」 fits someone branded heretical within a faith or defying the mainstream; 「異端派」 is such a group, not a person; 「同教徒」 is a fellow believer, the opposite. All three are formal written terms.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 自分じぶんが信仰しんこうする宗教しゅうきょうとは異ことなる宗教しゅうきょうを信仰しんこうする者もの。
2. 特とくにキリスト教きりすときょうの信者しんじゃからみてそれ以外いがいの宗教しゅうきょうを信仰しんこうする者もの。