Well, there's [RAMBLE], which, as far as I know, doesn't ban you for using these words, but also 8chan.moe (.se clear net mirror, .cc clear net mirror, Tor v3 mirror, Tor2web mirror - warning: clear net mirrors use Clownflare, which is a privacy issue (clear net only)), Nanochan (Tor v3 only), anon.cafe (.org clear net mirror, .co clear net mirror, Tor v3 mirror), zzzchan (Tor v3 mirror - warning: clear net mirror uses Clownflare), and maybe some others.

Note that some boards might add rules preventing you from using "racist" words, but I checked 8chan.moe/v/, Nanochan/g/, anon.cafe/comfy/, zzzchan/x/, and it looks like there are no additional rules that ban those types of words.