applet vs application program

applet and application program both are nouns.

Word	Noun	Adjective	Verb	Adverb
applet	Yes	No	No	No
application program	Yes	No	No	No

As nouns, application program is a hypernym of applet; that is, application program is a word with a broader meaning than applet:

applet: a Java application; an application program that uses the client's web browser to provide a user interface
application program: a program that gives a computer instructions that provide the user with tools to accomplish a task

Other hypernyms of applet include application, applications programme.

applet (noun)	application program (noun)
a Java application; an application program that uses the client's web browser to provide a user interface	a program that gives a computer instructions that provide the user with tools to accomplish a task