software engineer vs coder

software engineer and coder both are nouns.

Word	Noun	Adjective	Verb	Adverb
software engineer	Yes	No	No	No
coder	Yes	No	No	No

As nouns, software engineer and coder are synonyms defined as:

software engineer and coder: a person who designs and writes and tests computer programs

Other synonyms of software engineer include computer programmer, programmer.

software engineer (noun)	coder (noun)
a person who designs and writes and tests computer programs	a person who designs and writes and tests computer programs