No it isnt.
crap = cagada
Yes, when a person says the word 'goddamn' it is considered swearing.
is knobhead a swear word
Only the word hell
Yes, but it's a slang word.
It is slang and a vulgar word
Yes, It means that when your feeling like crap then you have to go take a crap.
Crap is not a swear word, exactly, but it is too vulgar for polite conversation.
No
No - it is vulgar
yes