booby vs dumbbell

booby and dumbbell both are nouns.

Word	Noun	Adjective	Verb	Adverb
booby	Yes	No	No	No
dumbbell	Yes	No	No	No

As nouns, booby and dumbbell are synonyms defined as:

Other synonyms of booby include boob, dope, dummy, pinhead.

booby (noun)	dumbbell (noun)
small tropical gannet having a bright bill or bright feet or both	an exercising weight; two spheres connected by a short bar that serves as a handle
an ignorant or foolish person	an ignorant or foolish person