A dictionary of Confusable Phrases: More Than 10,000 Idioms and Collocations

have no conscience about something

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death on his conscience. The man had stolen a television set —
for all Boldt knew that was the full extent of his crime.
have no fear for something • have no fear of
something
have no fear for something —be not concerned or worried
about smth.: We have no fear for the Church of England in
her competition with the denominational bodies around her.
have no fear of something —be not afraid of smth.: Chief
Julian Fantino says he is sure of one thing: gangs in Toronto
have “no fear of the law.”
have no guts for something • have no stomach for
something
have no guts for something —(coll.) lack courage and deter-
mination for smth.: Too bad she had no guts for the job or
she should have been our first woman President.
have no stomach for something —(coll.) intensely dislike smth.;
be averse to smth., especially smth. difficult or unpleasant: At
Harvard it became clear that I had no stomach for the law.
Note: 
The expression is not equivalent in meaning to the phrase
have no heart for something
— have no inclination or enthu-
siasm for smth.: Mozart had no heart for the intricate court
dance needed to succeed in Paris society.
have no idea of something • have no thought of
something
have no idea of something —have no knowledge of smth.:
Unless you have attempted to shower a person who does not
want a shower then you have no idea of how difficult that can
be.
have no thought of something —have no intention of doing
smth.: I lost all remembrance of my home and people, and
had no thought of returning to them.
have no quarrel with someone • not quarrel with
someone
have no quarrel with someone —have no cause for a dispute
or an argument with a person: They looked on the Germans
as half-brothers and they had no quarrel with them.
not quarrel with someone —have no argument or disagree-
ment with a person: He did not make friends with his school-
mates, though he did not quarrel with them either.