software documentation vs documentation

software documentation and documentation both are nouns.

Word	Noun	Adjective	Verb	Adverb
software documentation	Yes	No	No	No
documentation	Yes	No	No	No

As nouns, software documentation and documentation are synonyms defined as:

software documentation and documentation: program listings or technical manuals describing the operation and use of programs

software documentation (noun)	documentation (noun)
program listings or technical manuals describing the operation and use of programs	documentary validation
	confirmation that some fact or statement is true through the use of documentary evidence
	program listings or technical manuals describing the operation and use of programs