perissodactyl mammal vs odd-toed ungulate

perissodactyl mammal and odd-toed ungulate both are nouns.

Word	Noun	Adjective	Verb	Adverb
perissodactyl mammal	Yes	No	No	No
odd-toed ungulate	Yes	No	No	No

As nouns, perissodactyl mammal and odd-toed ungulate are synonyms defined as:

perissodactyl mammal and odd-toed ungulate: placental mammals having hooves with an odd number of toes on each foot

Other synonyms of perissodactyl mammal include perissodactyl.

perissodactyl mammal (noun)	odd-toed ungulate (noun)
placental mammals having hooves with an odd number of toes on each foot	placental mammals having hooves with an odd number of toes on each foot