religious vs votary

religious and votary both are nouns.

Word	Noun	Adjective	Verb	Adverb
religious	Yes	Yes	No	No
votary	Yes	No	No	No

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

religious: a member of a religious order who is bound by vows of poverty and chastity and obedience
votary: one bound by vows to a religion or life of worship or service

Other hyponyms of religious include friar, mendicant, monastic, monk, Benedictine, Jesuit, nun, eremite, cenobite, coenobite, superior.

religious (noun)	votary (noun)
a member of a religious order who is bound by vows of poverty and chastity and obedience	one bound by vows to a religion or life of worship or service
	a priest or priestess (or consecrated worshipper) in a non-Christian religion or cult
	a devoted (almost religiously so) adherent of a cause or person or activity

religious (adjective)	votary (adjective)
having or showing belief in and reverence for a deity
of or relating to clergy bound by monastic vows
concerned with sacred matters or religion or the church
extremely scrupulous and conscientious