cairn vs marker

cairn and marker both are nouns.

Word	Noun	Adjective	Verb	Adverb
cairn	Yes	No	No	No
marker	Yes	No	No	No

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

cairn: a mound of stones piled up as a memorial or to mark a boundary or path
marker: a distinguishing symbol

Other hypernyms of cairn include mark, marking.

cairn (noun)	marker (noun)
small rough-haired breed of terrier from Scotland	some conspicuous object used to distinguish or mark something
a mound of stones piled up as a memorial or to mark a boundary or path	a writing implement for making a mark
	a distinguishing symbol