terrier vs cairn

terrier and cairn both are nouns.

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

As nouns, cairn is a hyponym of terrier; that is, cairn is a word with a more specific, narrower meaning than terrier:

terrier: any of several usually small short-bodied breeds originally trained to hunt animals living underground
cairn: small rough-haired breed of terrier from Scotland

terrier (noun)	cairn (noun)
any of several usually small short-bodied breeds originally trained to hunt animals living underground	small rough-haired breed of terrier from Scotland
	a mound of stones piled up as a memorial or to mark a boundary or path