sabertooth vs saber-toothed tiger

sabertooth and saber-toothed tiger both are nouns.

Word	Noun	Adjective	Verb	Adverb
sabertooth	Yes	No	No	No
saber-toothed tiger	Yes	No	No	No

As nouns, sabertooth and saber-toothed tiger are synonyms defined as:

sabertooth and saber-toothed tiger: any of many extinct cats of the Old and New Worlds having long swordlike upper canine teeth; from the Oligocene through the Pleistocene

sabertooth (noun)	saber-toothed tiger (noun)
any of many extinct cats of the Old and New Worlds having long swordlike upper canine teeth; from the Oligocene through the Pleistocene	any of many extinct cats of the Old and New Worlds having long swordlike upper canine teeth; from the Oligocene through the Pleistocene