assembler vs assembly program

assembler and assembly program both are nouns.

Word	Noun	Adjective	Verb	Adverb
assembler	Yes	No	No	No
assembly program	Yes	No	No	No

As nouns, assembler and assembly program are synonyms defined as:

assembler and assembly program: a program to convert assembly language into machine language

assembler (noun)	assembly program (noun)
a program to convert assembly language into machine language	a program to convert assembly language into machine language