1.adherence和adhesion
这两个词都是"粘附的"意思。
adherence用于比喻的意思。
例如：His adherence to the strict letter of the law.
adhesion是指物质上的。
2. adjacent，adjoining，和contiguous
这些词都有next to"紧挨"的意思。
adjacent"毗邻的，邻近的"，但它们可能并不相互直接接触。
adjoining和contiguous指相互接触，通常之间有一个edge或boundary.
3.admission和admittance
它们都有"the act of entering"的意思。
但admission用于公共场合。
The price of admission to the gallery is$5.
admittance不指公共场合，一般指私人的住所。
4. adopted和adoptive
adopted"收养的，过继的"
an adopted son(daughter)养子(女);
my adopted country我所入籍的国家;
adopted words外来语;
adoptive"收养的"，我们说adoptive parents，但很少说adoptive child;
"采用的"，"假冒的"an adoptive courage假充勇敢。
5.averse和adverse
adverse"不利的，反对的"，用于事，不用于人。
adverse weather conditions;an adverse reaction.
averse"嫌恶的，反对的，不乐意的"，常和"to"一起使用，而且用否定形式。
6.advise和advice
advise"劝告"(动词);advice"劝告"(名词)。
7.affect和effect
affect"影响"vt.，它的第二个意思是"假装"，
Though she affected indifference，I knew she was really very upset.
effect n."结果"，"效力"。vt."产生"，"导致"，它比"to cause，to bring out"更为正式。
His aim was to effect a radical change in the party structure.
8.all ready和already
all ready意思是"completely prepared"
already"已经"。He had already had his lunch.
9.altogether和all together
altogether(in total)"总共"
all together意思是"in a group"。
如：We put the sheep all together in one field.
这两个词还可以分开。We put all the sheep together in one field.
