bottle-nosed dolphin vs bottlenose

bottle-nosed dolphin and bottlenose both are nouns.

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

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

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

Other synonyms of bottle-nosed dolphin include bottlenose dolphin.

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