subscriber vs endorser

subscriber and endorser both are nouns.

Word	Noun	Adjective	Verb	Adverb
subscriber	Yes	No	No	No
endorser	Yes	No	No	No

As nouns, subscriber and endorser are synonyms defined as:

Other synonyms of subscriber include indorser, ratifier.

subscriber (noun)	endorser (noun)
someone who contributes (or promises to contribute) a sum of money	someone who expresses strong approval
someone who contracts to receive and pay for a service or a certain number of issues of a publication	a person who transfers his ownership interest in something by signing a check or negotiable security
someone who expresses strong approval