safecracker vs cracksman

safecracker and cracksman both are nouns.

Word	Noun	Adjective	Verb	Adverb
safecracker	Yes	No	No	No
cracksman	Yes	No	No	No

As nouns, safecracker and cracksman are synonyms defined as:

safecracker and cracksman: a thief who breaks open safes to steal valuable contents

Other synonyms of safecracker include safebreaker.

safecracker (noun)	cracksman (noun)
a thief who breaks open safes to steal valuable contents	a thief who breaks open safes to steal valuable contents