swear word 
noun
An offensive word, used especially as an expression of anger.I talk to myself, and most of those words are swear words....
- She said she knows the word is a swear word, but ‘It is all in the context of what - of how it is used and when it is used.’
- In sensitive company it is accepted practice to substitute another word for the swear word which has caused the censors to issue the 18 certificate.
Synonyms
expletive, obscenity, oath, curse, imprecation, epithet, dirty word, four-letter word
North American informal cuss word
(swear words) bad language, foul language, profanity, blasphemy, swearing