attention vs courtesy

attention and courtesy both are nouns.

Word	Noun	Adjective	Verb	Adverb
attention	Yes	No	No	No
courtesy	Yes	No	No	No

As nouns, courtesy is a hypernym of attention; that is, courtesy is a word with a broader meaning than attention:

attention (noun)	courtesy (noun)
the work of providing treatment for or attending to someone or something	a courteous or respectful or considerate act
a courteous act indicating affection	a courteous manner
a motionless erect stance with arms at the sides and feet together; assumed by military personnel during drill or review	a courteous or respectful or considerate remark
the process whereby a person concentrates on some features of the environment to the (relative) exclusion of others
the faculty or power of mental concentration
a general interest that leads people to want to know more