ponderousness vs heft

ponderousness and heft both are nouns.

Word	Noun	Adjective	Verb	Adverb
ponderousness	Yes	No	No	No
heft	Yes	No	Yes	No

As nouns, ponderousness and heft are synonyms defined as:

Other synonyms of ponderousness include heftiness, massiveness, ponderosity.

ponderousness (noun)	heft (noun)
the property of being large in mass	the property of being large in mass
an oppressive quality that is laborious and solemn and lacks grace or fluency

ponderousness (verb)	heft (verb)
	lift or elevate
	test the weight of something by lifting it