cracksman vs safebreaker

cracksman and safebreaker both are nouns.

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

As nouns, cracksman and safebreaker are synonyms defined as:

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

Other synonyms of cracksman include safecracker.

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