requester vs applier

requester and applier both are nouns.

Word	Noun	Adjective	Verb	Adverb
requester	Yes	No	No	No
applier	Yes	No	No	No

As nouns, applier is a hypernym of requester; that is, applier is a word with a broader meaning than requester:

requester: one praying humbly for something
applier: a person who requests or seeks something such as assistance or employment or admission

Other hypernyms of requester include applicant.

requester (noun)	applier (noun)
one praying humbly for something	a device for applying a substance
	a person who requests or seeks something such as assistance or employment or admission