Difference between Hollow and Vacuous

HOLLOW vs VACUOUS: NOUN

A cavity, gap, or space.
A small valley between mountains
A depression hollowed out of solid matter
A void; an emptiness.
An indented or concave surface or area.
A small valley between hills or mountains.
A cavity; a depression or an excavation below the general level, as of the ground, or in the substance of anything; an empty space in anything; a concavity.
Specifically, a concave space of ground; a piece or tract of land lower than the general level, or hemmed in by hills: used in many place-names in the United States: as, Sleepy Hollow in New York.
A concave plane used in working moldings.
A strip of thick paper or of pasteboard cut to the exact height and thickness required for a book for which the boards and cloth are intended, and which acts as a gage for the guidance of the case-makers, and as a stiffener for the cloth at the back of the book between the boards.
A cavity, natural or artificial; an unfilled space within anything; a hole, a cavern; an excavation; as the hollow of the hand or of a tree.
A low spot surrounded by elevations; a depressed part of a surface; a concavity; a channel.
A small valley between mountains; "he built himself a cabin in a hollow high up in the Rockies"
A sunken area in something solid.
A sunken area, the equivalent to a copse in British English.
A cavity or space in something

Having a reverberating, sepulchral sound.
Devoid of truth or validity; specious.
Without substance or character: : vain.
Having an empty space or cavity, natural or artificial, within a solid substance; not solid; excavated in the interior
Deeply indented or concave; sunken.
Having a cavity, gap, or space within.
Deliberately deceptive
Devoid of significance or point
As if echoing in a hollow space
Not solid; having a space or gap or cavity
Hollow vessels; -- a trade name for cast-iron kitchen utensils, earthenware, etc.
See Square.
See Moschatel.
A pier of stone or brick made behind the lock gates of a canal, and containing a hollow or recess to receive the ends of the gates.
An opening in the center of a winding staircase in place of a newel post, the stairs being supported by the wall; an open newel; also, the stringpiece or rail winding around the well of such a staircase.
Reverberated from a cavity, or resembling such a sound; deep; muffled.
Depressed; concave; gaunt; sunken.

Wholly; completely; utterly; -- chiefly after the verb to beat, and often with all. See all, adv.

Faithless, iusincere, treacherous, hypocritical.
Synonyms Empty, void, cavernous.
Having, as wool, the fibers torn apart, so that it is light and open.
Thorough; complete; out-and-out.
Void of meaning or truth; empty; baseless: as, hollow oaths; a hollow mockery.
Devoid of significance or force
Lacking in substance or character
Not solid
Having a space or gap or cavity
Not sincere or faithful; false; deceitful; not sound: as, a hollow heart.
Empty; without contents; hence, without pith or substance; fruitless; worthless: as, a hollow victory; a hollow argument.
Resembling sound reverberated from a cavity, or producing such a sound; deep; low.
Having a concavity; concave; sunken: as, a hollow way or road.
To make hollow; excavate; make empty.
To bend into a curved or concave form.
A variant of hollo.
Beyond doubt or question; utterly; completely; out-and-out: often with all for emphasis: as, he beat him hollow, or all hollow; he carried it hollow.
Having a cavity within; having an empty space in the interior: as, a hollow tree; a hollow rock; a hollow sphere.

Devoid of intelligence or thought
Without intelligence or intelligent expression; unexpressive; showing no intelligence: as, a vacuous look.
Empty; unfilled; void; vacant.
Devoid of significance or force

Holler, Excavate, Hole, Dig, Recessed, Sunken, Tubular, Cavernous, Ringing, Reverberant, False, Empty, Insincere, Vacuous, Meaningless

Insipid, Banal, Vapid, Lacunae, Blank, Insubstantial, Bland, Empty, Foolish, Hollow, Asinine, Meaningless, Mindless, Inane, Fatuous

Holler, Excavate, Hole, Dig, Recessed, Sunken, Tubular, Cavernous, Ringing, Reverberant, False, Empty, Insincere, Vacuous, Meaningless

Insipid, Banal, Vapid, Lacunae, Blank, Insubstantial, Bland, Empty, Foolish, Hollow, Asinine, Meaningless, Mindless, Inane, Fatuous

Instead of a half hollow, I can create a true singing extra hollow using a progression of jigs with ever tighter clearance.
Hollow Metal Doors: Fit hollow metal doors accurately in frames, within clearances specifiedbelow.
Mi now know what it feels like To be hollow, to be hollow.
The apparatus provides a plurality of hollow fiber separation wafers, each wafer comprising a mat of hollow fibers.
This Vshape should extend into the center of the hollow where the spindle will make the hollow deeper.
The rods are hollow and contain an inner tube which sits inside the hollow outer rod barrel.
In this process, flat sheets are drawn into hollow shapes to produce hollow bodies such as cans, helmets and body parts.
Top Rod Only Fire Rated Exit Device Hollow Metal Door with Hollow Metal Frame Installation.
According to Hollow Knight developer Team Cherry, Silksong originally began as DLC for Hollow Knight.
Her original hollow form was that of a wolf hollow.