assay-mark vs marker

assay-mark and marker both are nouns.

Word	Noun	Adjective	Verb	Adverb
assay-mark	Yes	No	No	No
marker	Yes	No	No	No

As nouns, marker is a hypernym of assay-mark; that is, marker is a word with a broader meaning than assay-mark:

assay-mark: a mark on an article of trade to indicate its origin and authenticity
marker: a distinguishing symbol

Other hypernyms of assay-mark include mark, marking.

assay-mark (noun)	marker (noun)
a mark on an article of trade to indicate its origin and authenticity	some conspicuous object used to distinguish or mark something
	a writing implement for making a mark
	a distinguishing symbol