boob vs dumbbell

boob and dumbbell both are nouns.

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

As nouns, boob and dumbbell are synonyms defined as:

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

boob (noun)	dumbbell (noun)
either of two soft fleshy milk-secreting glandular organs on the chest of a woman	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

boob (verb)	dumbbell (verb)
commit a faux pas or a fault or make a serious mistake