Good Friend
Buddy-Buddy
noun, の adjective
When your relationship with someone is really good, you naturally become good friends. You're always palling around together and acting buddy-buddy, so everyone can tell how close your friendship is.
仲良し describes close friends or people who get along really well. The word has a friendly, cute vibe and is often used for kids, families, or anyone with a warm bond.
Both the readings here are kun'yomi, which you already know. Just be careful with 良 — in 良い, it can be read よ or い, but in 良し it's always read as よ.
あの二人、仲良しなふりをしているだけで、本当は仲が悪いと思うよ。
I think they are just pretending to be intimate friends and they don't actually like each other.
先日、日本に住んでいる仲良しの友人から、メールが来ました。
The other day, I received an email from a close friend who lives in Japan.
あの子たち、ホントに仲良しだよね！
Those kids are really good friends, aren't they?