bottlenose vs bottle-nosed dolphin

bottlenose and bottle-nosed dolphin both are nouns.

Word	Noun	Adjective	Verb	Adverb
bottlenose	Yes	No	No	No
bottle-nosed dolphin	Yes	No	No	No

As nouns, bottlenose and bottle-nosed dolphin are synonyms defined as:

bottlenose and bottle-nosed dolphin: any of several dolphins with rounded forehead and well-developed beak; chiefly of northern Atlantic and Mediterranean

Other synonyms of bottlenose include bottlenose dolphin.

bottlenose (noun)	bottle-nosed dolphin (noun)
northern Atlantic beaked whale with a bulbous forehead	any of several dolphins with rounded forehead and well-developed beak; chiefly of northern Atlantic and Mediterranean
any of several dolphins with rounded forehead and well-developed beak; chiefly of northern Atlantic and Mediterranean