weighty

As a numeral eighty

is the cardinal number occurring after seventy-nine and before eighty-one, represented in roman numerals as lxxx and in arabic numerals as.

As an adjective weighty is

having weight; heavy; ponderous; as, a weighty body.

As a noun taxonomy

is the science or the technique used to make a classification.

As an adjective weighty is

having weight; heavy; ponderous; as, a weighty body.

As adjectives the difference between weighty and cogent

is that weighty is having weight; heavy; ponderous; as, a weighty body while cogent is reasonable and convincing; based on evidence.

As adjectives the difference between weighty and mightly

is that weighty is having weight; heavy; ponderous; as, a weighty body while mightly is mighty; competent; capable; strong; powerful.

As an adverb mightly is

mightily.

As an adjective weighty

is having weight; heavy; ponderous; as, a weighty body.

As an adverb weightily is

in a weighty manner; ponderously; forcibly.