poorly vs peaked

poorly and peaked both are adjectives.

Word	Noun	Adjective	Verb	Adverb
poorly	No	Yes	No	Yes
peaked	No	Yes	No	No

As adjectives, poorly and peaked are synonyms defined as:

Other synonyms of poorly include ailing, indisposed, seedy, sickly, under the weather, unwell.

poorly (adjective)	peaked (adjective)
somewhat ill or prone to illness	somewhat ill or prone to illness
	having or rising to a peak

poorly (adverb)	peaked (adverb)
(`ill' is often used as a combining form) in a poor or improper or unsatisfactory manner; not well