cracksman vs safecracker

cracksman and safecracker both are nouns.

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

As nouns, cracksman and safecracker are synonyms defined as:

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

Other synonyms of cracksman include safebreaker.

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