ticket-stamping machine vs ticket stamping machine

ticket-stamping machine and ticket stamping machine both are nouns.

Word	Noun	Adjective	Verb	Adverb
ticket-stamping machine	Yes	No	No	No
ticket stamping machine	Yes	No	No	No

As nouns, ticket-stamping machine and ticket stamping machine are synonyms defined as:

ticket-stamping machine and ticket stamping machine: an automatic machine that makes the ticket valid by stamping it with the location information and the timestamp.

ticket-stamping machine (noun)	ticket stamping machine (noun)
an automatic machine that makes the ticket valid by stamping it with the location information and the timestamp.	an automatic machine that makes the ticket valid by stamping it with the location information and the timestamp.