update README.adoc (#8412)

Fixes for better understanding and reading to developers. Added exact outputs and specific word names.

Note!
 - Couldn't merge the approved previous pull request found at https://github.com/paritytech/substrate/pull/8409 which is the same as this one, that I proposed earlier on.

substrate/bin/utils/subkey/README.adoc

@@ -12,7 +12,7 @@ Subkey is a commandline utility included with Substrate that generates or restor
 subkey generate
 ```
 
-Will output a mnemonic phrase and give you the seed, public key, and address of a new account. DO NOT SHARE your mnemonic or seed with ANYONE it will give them access to your funds. If someone is making a transfer to you they will only need your **Address**.
+Will output a secret phrase("mnemonic phrase") and give you the secret seed("Private Key"), public key("Account ID") and SS58 address("Public Address") of a new account. DO NOT SHARE your mnemonic phrase or secret seed with ANYONE it will give them access to your funds. If someone is making a transfer to you they will only need your **Public Address**.
 
 === Inspecting a key
 
@@ -80,4 +80,4 @@ Public Key URI `F3opxRbN5ZbjJNU511Kj2TLuzFcDq9BGduA9TgiECafpg29` is account:
   Public key (hex):   0x6d6f646c70792f74727372790000000000000000000000000000000000000000
   Account ID:         0x6d6f646c70792f74727372790000000000000000000000000000000000000000
   SS58 Address:       F3opxRbN5ZbjJNU511Kj2TLuzFcDq9BGduA9TgiECafpg29
-```
\ No newline at end of file
+```