indisposed vs under the weather

indisposed and under the weather both are adjectives.

Word	Noun	Adjective	Verb	Adverb
indisposed	No	Yes	No	No
under the weather	No	Yes	No	No

As adjectives, indisposed and under the weather are synonyms defined as:

Other synonyms of indisposed include ailing, peaked, poorly, seedy, sickly, unwell.

indisposed (adjective)	under the weather (adjective)
(usually followed by `to') strongly opposed	somewhat ill or prone to illness
somewhat ill or prone to illness