bonnethead vs bonnet shark

bonnethead and bonnet shark both are nouns.

Word	Noun	Adjective	Verb	Adverb
bonnethead	Yes	No	No	No
bonnet shark	Yes	No	No	No

As nouns, bonnethead and bonnet shark are synonyms defined as:

bonnethead and bonnet shark: small harmless hammerhead having a spade-shaped head; abundant in bays and estuaries

Other synonyms of bonnethead include shovelhead, Sphyrna tiburo.

bonnethead (noun)	bonnet shark (noun)
small harmless hammerhead having a spade-shaped head; abundant in bays and estuaries	small harmless hammerhead having a spade-shaped head; abundant in bays and estuaries