illy

As a noun filly

is a young female horse.

As an adverb illy is

badly; poorly.

As an adjective silly

is (label) pitiable; deserving of compassion; helpless.

As a noun silly

is (colloquial) a silly person; a fool.

As an adverb illy is

badly; poorly.

As a noun taxonomy

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

As an adverb illy is

badly; poorly.

As adverbs the difference between poorly and illy

is that poorly is in a poor manner or condition; without plenty, or sufficiency, or suitable provision for comfort while illy is badly; poorly.

As an adjective poorly

is ill, unwell, sick.