You could literally just look the naming convention up in wikipedia:
> Paracetamol is the Australian Approved Name[170] and British Approved Name[171] as well as the international nonproprietary name used by the WHO and in many other countries; acetaminophen is the United States Adopted Name[171] and Japanese Accepted Name and also the name generally used in Canada,[171] Venezuela, Colombia, and Iran.[171][172] Both paracetamol and acetaminophen are contractions of chemical names for the compound. The word "paracetamol" is a shortened form of para-acetylaminophenol,[173] and was coined by Frederick Stearns & Co in 1956,[174] while the word "acetaminophen" is a shortened form of N-acetyl-p-aminophenol (APAP), which was coined and first marketed by McNeil Laboratories in 1955.
> Paracetamol is the Australian Approved Name[170] and British Approved Name[171] as well as the international nonproprietary name used by the WHO and in many other countries; acetaminophen is the United States Adopted Name[171] and Japanese Accepted Name and also the name generally used in Canada,[171] Venezuela, Colombia, and Iran.[171][172] Both paracetamol and acetaminophen are contractions of chemical names for the compound. The word "paracetamol" is a shortened form of para-acetylaminophenol,[173] and was coined by Frederick Stearns & Co in 1956,[174] while the word "acetaminophen" is a shortened form of N-acetyl-p-aminophenol (APAP), which was coined and first marketed by McNeil Laboratories in 1955.