Purchase or download free versions of digital-audio manipulation software such as Audacity, Adobe Audition or GarageBand. Save a master copy of your song and work with a copy.
Bleep the questionable words from your music with your software. Open the software and separate the vocal track from the instrumental track of your song. Locate and set the focus of your software on the offending word in the vocal track. Click-and-drag to highlight the word, then click "Generate," then "Tone." Choose from a list of tones to replace the word and save your work.
Alternately, eliminate the word you want to censor by creating a moment of silence in its place in the song. Open the song and separate the vocal track from the instrumental track in your digital-audio editor so that you will still hear the instrumental track when the word is muted. Click-and-drag to select the word that you want to work with. Click "Effects," then "Amplify" and manipulate the "Gain" control as far as it will go to create a moment of silence in place of the word.
Another option is to replace the questionable word with a word that can be broadcasted legally. Open the software and use the "Record" feature to rerecord the word or words that you are worried about.
Select the word or words by clicking "Edit," then "Copy." Open the song that you want to censor and click-and-drag to highlight the line containing the questionable word like you did in the previous steps. Click "Edit," then "Paste" to replace the word or word with the version that you recorded at the beginning of the step. Listen to the track and make adjustments in the software in regard to volume and tone to get the new version to flow smoothly with the original track. Repeat the steps until you get the desired results.