claimant vs applier

claimant and applier both are nouns.

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

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

claimant: someone who claims a benefit or right or title
applier: a person who requests or seeks something such as assistance or employment or admission

Other hypernyms of claimant include applicant.

claimant (noun)	applier (noun)
someone who claims a benefit or right or title	a device for applying a substance
	a person who requests or seeks something such as assistance or employment or admission