documentation vs software

documentation and software both are nouns.

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

As nouns, software is a hypernym of documentation; that is, software is a word with a broader meaning than documentation:

documentation: program listings or technical manuals describing the operation and use of programs
software: (computer science) written programs or procedures or rules and associated documentation pertaining to the operation of a computer system and that are stored in read/write memory

Other hypernyms of documentation include computer software, package, software package, software program, software system.

documentation (noun)	software (noun)
documentary validation	(computer science) written programs or procedures or rules and associated documentation pertaining to the operation of a computer system and that are stored in read/write memory
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