bottlenose dolphin vs bottlenose

bottlenose dolphin and bottlenose both are nouns.

Word	Noun	Adjective	Verb	Adverb
bottlenose dolphin	Yes	No	No	No
bottlenose	Yes	No	No	No

As nouns, bottlenose dolphin and bottlenose are synonyms defined as:

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

Other synonyms of bottlenose dolphin include bottle-nosed dolphin.

bottlenose 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