meetinghouse vs conventicle

meetinghouse and conventicle both are nouns.

Word	Noun	Adjective	Verb	Adverb
meetinghouse	Yes	No	No	No
conventicle	Yes	No	No	No

As nouns, meetinghouse and conventicle are synonyms defined as:

meetinghouse and conventicle: a building for religious assembly (especially Nonconformists, e.g., Quakers)

meetinghouse (noun)	conventicle (noun)
a building for religious assembly (especially Nonconformists, e.g., Quakers)	a building for religious assembly (especially Nonconformists, e.g., Quakers)
	a secret unauthorized meeting for religious worship