单词及音标如下：
1. allergy /əˈlɑːdʒɪ/，意思是过敏反应；
2. Alger /əˈlɛɡə/，意思是阿尔及利亚；
3. allegiance /ˌəˈliːdʒəns/，意思是忠诚；
4. allegorical /ˌəˈlɪdʒərɪkl/，意思是寓言的；
5. allegory /əˈledʒərɪ/，意思是寓言。
发音分别为：
1. [əˈlɑːdʒɪ]
2. [əˈlɛɡər]
3. [əˈlɪdʒəns]
4. [əˈledʒərɪk]
5. [əˈledʒərɪ]
分别的意思及用法如下：
1. allergy：过敏反应。意思是指因对某物质产生异常免疫反应而导致的疾病，常表现为过敏症状。用法：主语+be allergic to +物质。例句：He is allergic to shellfish.（他对贝类海鲜过敏。）
2. Alger：阿尔及利亚。用法：国家名称。
3. allegiance：忠诚。意思是指对某人的忠诚或对国家的效忠。用法：be loyal to +人/对…忠诚。例句：He gave his allegiance to the king.（他对国王效忠。）
4. allegorical：寓言的。用法：常用来修饰寓言。例句：The story is allegorical and symbolic of human weakness.（这个故事是寓言，象征着人类的弱点。）
5. allegory：寓言。意思是指含有讽喻或象征意义的短篇故事。用法：常与is/are a +名词连用。例句：The fable is a warning against greed.（这个寓言是告诫人们要节制贪婪。）
分别的记忆可以通过联想记忆，如allergy和allegiance这两个单词都含有“对…的”含义，可以通过联想记忆区分开来。其他单词可以通过词源记忆等方法来记。
根据公开资料，没有关于alleger物理现象的相关信息，为您提供两个相近概念：
1. 阿尔热效应：阿尔热效应是指当电流通过导体时，会产生磁场，并作用于附近的其他金属，使它们产生相应的电流。这种现象通常用于金属的磁性测量和分类。
2. 热电效应：热电效应是指当热电材料处于不同的温度时，会产生电荷的流动。这种效应可用于制造热电发电系统，将热能转化为电能。
如果您的问题是关于其他物理现象，请提供更多信息，我将尽力回答。
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