press stud vs snap fastener

press stud and snap fastener both are nouns.

Word	Noun	Adjective	Verb	Adverb
press stud	Yes	No	No	No
snap fastener	Yes	No	No	No

As nouns, press stud and snap fastener are synonyms defined as:

press stud and snap fastener: a fastener used on clothing; fastens with a snapping sound

Other synonyms of press stud include snap.

press stud (noun)	snap fastener (noun)
a fastener used on clothing; fastens with a snapping sound	a fastener used on clothing; fastens with a snapping sound