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| apologetic | 
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| a.  offering or expressing an apology or excuse; serving as or containing a formal justification or defense | 
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| apparatus | 
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| n. Syn. equipment a group of parts that work together to perform given function; appliance or device for particular purpose | 
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| apparent | 
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| a. Syn. visible capable of being seen, or easily seen; open to view; visible to eye | 
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| applaud | 
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| v. Syn. clap; acclaim acclaim; express approval, especially by clapping the hands | 
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| appliance | 
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| n.  durable goods for home or office use; device or instrument for household use | 
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| appraisal | 
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| n. Syn. assessment; evaluation assessment; evaluation; the classification of someone or something with respect to its worth | 
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| apt | 
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| a. Syn. appropriate; suitable likely; exactly suitable; appropriate; quick to learn or understand | 
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| aptitude | 
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| n. Syn. intelligence; talent inherent ability; quickness in learning and understanding | 
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| aquarium | 
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| n.  tank or pool or bowl filled with water for keeping live fish and underwater animals |