signer vs abhorrer

signer and abhorrer both are nouns.

Word	Noun	Adjective	Verb	Adverb
signer	Yes	No	No	No
abhorrer	Yes	No	No	No

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

signer: someone who signs and is bound by a document
abhorrer: a signer of a 1679 address to Charles II in which those who petitioned for the reconvening of parliament were condemned and abhorred

Other hyponyms of signer include cosignatory, cosigner, cosigner, endorser, indorser, attestant, attestator, attestor, witness.

signer (noun)	abhorrer (noun)
someone who signs and is bound by a document	a signer of a 1679 address to Charles II in which those who petitioned for the reconvening of parliament were condemned and abhorred
someone who can use sign language to communicate