The difference between Mound and Orb

When used as nouns, mound means an artificial hill or elevation of earth, whereas orb means a spherical body.

When used as verbs, mound means to fortify with a mound, whereas orb means to form into an orb or circle.

check bellow for the other definitions of Mound and Orb

Mound as a noun:

An artificial hill or elevation of earth; a raised bank; an embankment thrown up for defense

Examples:

"synonyms: bulwark rampart"
Mound as a noun:

A natural elevation appearing as if thrown up artificially; a regular and isolated hill, hillock, or knoll.
Mound as a noun (baseball):

Elevated area of dirt upon which the pitcher stands to pitch.
Mound as a noun:

A ball or globe forming part of the regalia of an emperor or other sovereign. It is encircled with bands, enriched with precious stones, and surmounted with a cross.
Mound as a noun (US, vulgar, slang):

The mons veneris.
Mound as a noun (obsolete, anatomy, measurement, figuratively):

A hand.
Mound as a noun (obsolete):

A protection; restraint; curb.
Mound as a noun (obsolete):

A helmet.
Mound as a noun (obsolete):

Might; size.

Mound as a verb (transitive):

To fortify with a mound; add a barrier, rampart, etc. to.
Mound as a verb (transitive):

To force or pile into a mound or mounds.

Examples:

"He mounded up his mashed potatoes so they left more space on the plate for the meat."

Orb as a noun:

A spherical body; a globe; especially, one of the celestial spheres; a sun, planet, or star

Examples:

"'1609, w William Shakespeare, ''[[s:A Lover's Complaint A Lover's Complaint]]"
Orb as a noun:

One of the azure transparent spheres conceived by the ancients to be enclosed one within another, and to carry the heavenly bodies in their revolutions
Orb as a noun:

A circle; especially, a circle, or nearly circular orbit, described by the revolution of a heavenly body; an orbit

Examples:

"The schoolmen were like astronomers, which did feign eccentrics, and epicycles, and such engines of orbs. rfdatek Bacon"
Orb as a noun (rare):

A period of time marked off by the revolution of a heavenly body.
Orb as a noun (poetic):

The eye, as luminous and spherical
Orb as a noun (poetic):

A revolving circular body; a wheel

Examples:

"The orbs Of his fierce chariot rolled. rfdatek John Milton"
Orb as a noun (rare):

A sphere of action.

Examples:

"rfquotek Wordsworth"
Orb as a noun:

A globus cruciger; a ceremonial sphere used to represent royal power
Orb as a noun:

A translucent sphere appearing in flash photography (Orb (optics))
Orb as a noun (military):

A body of soldiers drawn up in a circle, as for defence, especially infantry to repel cavalry.

Orb as a verb (poetic, transitive):

To form into an orb or circle.

Examples:

"rfquotek Lowell"

"rfquotek Milton"
Orb as a verb (poetic, intransitive):

To become round like an orb.
Orb as a verb (poetic, transitive):

To encircle; to surround; to enclose.

Orb as a noun (architecture):

A blank window or panel.

Examples:

"rfquotek Oxf. Gloss"