What program do u use to edit words out of songs

[Sigma]

You can do it in any DAW, preferably a multi-track DAW like Adobe Audition or Audacity (the latter is free). One common way to do it is to make a split either side of the word so that it's a separate block of audio, then reverse just that block so that only that word plays backwards. That works OK if there's just the odd single word you want to censor.

Another way to do it, if you don't have an instrumental, is to see if there's a bar in the full version of the track that has no singing/rapping over it, then you can cut that out (duplicate it) and line it up with the bar that has the bad word in it, so that both are perfectly in line, lock both in place, then split either side of the bad word - and in the exact same place in the bar of instrumental you lined up - then remove the bad word and replace it with the section of instrumental you cut out, also removing the unnecessary bits of the instrumental. That method can work the best, as when done right (assuming you have a good bar of instrumental to use) it can make it sound pretty seamless, like just the word has been removed from the vocal track.

A third way is to mask the sounds with beeps or horns or whatever, so again, you would cut either side of the word so it's a block of audio on its own, then you'd lower the volume of that block while placing your masking sample on top of it.

The final way is to literally just cut the words out so you have gaps in the audio. I've heard DJs do that live on the radio by closing and opening the fader, although it's not the way I would choose to do it.