In songs, they often just rhyme the last word, so you could try something like "he's a liar" -- 3 syllables, with the last one rhyming. (In the song "Light My Fire" by the Doors, that is what they do-- they rhyme fire with liar, and higher and even pyre.)
The word "flame" rhymes with "claim" and also means fire.
Polluted? I don't know, im not that good with rhymes
fire
The word "expire" rhymes with fire and means to come to an end or die.
alpaka
yorkshire
sire
"you can be the witness"
.....Fetching Tire?
Tire and filedtire
Fire,liar,tire
flame