👥 Casual / Everyday

• tomodachi (友達) — friend (standard, most common)

• yuujin (友人) — friend (a bit more formal)

• nakama (仲間) — companion / member of the same group (strong bond)

• tomo (友) — poetic/short form of friend

---

🤝 Friendly but Neutral

• shiriai (知り合い) — acquaintance (not quite a friend yet)

• douryou (同僚) — colleague / coworker

• aibou (相棒) — partner (often used like “buddy,” strong pair bond)

• kyoudai (兄弟) — “brother,” used metaphorically for close male friends

---

❤️ Close / Deep

• shinyuu (親友) — best friend (very strong, emotional bond)

• kokoro no tomo (心の友) — “friend of the heart” (deep, almost poetic)

• soulmate (ソウルメイト) — borrowed word, same idea as English

• unzumei no tomo (運命の友) — “friend of fate” (very dramatic/rare)

---

🎭 Slang / Youth / Casual Vibe

• dachi (ダチ) — slang for friend (like “buddy”)

• maibro (マイブロ) — “my bro” (modern slang)

• nakayoshi (仲良し) — close friend / good friends (often cute tone)

• tomo-rachi (ともらち) — childish/cute way of saying tomodachi

---

⚠️ Subtle but Important Distinction

Japanese is very precise about relationship depth:

• 友達 (tomodachi) = real friend

• 知り合い (shiriai) = just someone you know

That distinction matters socially more than in English.

---

If you want, I can:

• Show which ones sound natural in anime vs real life

• Or give you phrases like “you’re my best friend” in Japanese with tone differences (serious vs funny vs dramatic)