conventual vs monastic

conventual is not a noun while monastic is a noun.

Word	Noun	Adjective	Verb	Adverb
conventual	No	Yes	No	No
monastic	Yes	Yes	No	No

As adjectives, conventual and monastic are synonyms defined as:

conventual and monastic: of communal life sequestered from the world under religious vows

Other synonyms of conventual include cloistered, cloistral, monastical.

conventual (noun)	monastic (noun)
	a male religious living in a cloister and devoting himself to contemplation and prayer and work

conventual (adjective)	monastic (adjective)
of communal life sequestered from the world under religious vows	of communal life sequestered from the world under religious vows