service stripe vs hash mark

service stripe and hash mark both are nouns.

Word	Noun	Adjective	Verb	Adverb
service stripe	Yes	No	No	No
hash mark	Yes	No	No	No

As nouns, service stripe and hash mark are synonyms defined as:

service stripe and hash mark: an insignia worn to indicate years of service

Other synonyms of service stripe include hashmark.

service stripe (noun)	hash mark (noun)
an insignia worn to indicate years of service	an insignia worn to indicate years of service