peaked vs ailing

peaked and ailing both are adjectives.

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

As adjectives, peaked and ailing are synonyms defined as:

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

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