petition vs ingathering

petition and ingathering both are nouns.

Word	Noun	Adjective	Verb	Adverb
petition	Yes	No	Yes	No
ingathering	Yes	No	No	No

As nouns, ingathering is a hyponym of petition; that is, ingathering is a word with a more specific, narrower meaning than petition:

petition: a formal message requesting something that is submitted to an authority
ingathering: request for a sum of money

Other hyponyms of petition include application, appeal, collection, solicitation, demand.

petition (noun)	ingathering (noun)
a formal message requesting something that is submitted to an authority	request for a sum of money
reverent petition to a deity

petition (verb)	ingathering (verb)
write a petition for something to somebody; request formally and in writing