syntax error vs software error

syntax error and software error both are nouns.

Word	Noun	Adjective	Verb	Adverb
syntax error	Yes	No	No	No
software error	Yes	No	No	No

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

syntax error: an error of language resulting from code that does not conform to the syntax of the programming language
software error: error resulting from bad code in some program involved in producing the erroneous result

Other hypernyms of syntax error include programming error.

syntax error (noun)	software error (noun)
an error of language resulting from code that does not conform to the syntax of the programming language	error resulting from bad code in some program involved in producing the erroneous result