molding vs architrave

molding and architrave both are nouns.

Word	Noun	Adjective	Verb	Adverb
molding	Yes	No	No	No
architrave	Yes	No	No	No

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

molding (noun)	architrave (noun)
a preliminary sculpture in wax or clay from which a finished work can be copied	the lowest part of an entablature; rests immediately on the capitals of the columns
the act of creating something by casting it in a mold	the molding around a door or window
a decorative recessed or relieved surface on an edge
a decorative strip used for ornamentation or finishing
sculpture produced by molding