The difference between Apex and Crown

Apex as a noun:

The "highest" or the greatest point of something.

Apex as a noun (figuratively):

The moment of greatest success, expansion, etc.

Apex as a noun (geometry):

The topmost vertex of a cone or pyramid (in their conventional orientation).

Apex as a noun (chiefly, anatomy):

The "pointed" fine end of something. The lowest part of the human heart. The deepest part of a tooth's root.

Apex as a noun (botany):

The end of a leaf, petal or similar organ opposed to the end where it is attached to its support; the tip.

Apex as a noun (astronomy):

The point on the celestial sphere toward which the sun appears to move relative to nearby stars.

Apex as a noun (physics):

The lowest point on a pendant drop of a liquid.

Apex as a noun (mining, US):

The end or edge of a vein nearest the surface.

Apex as a noun (typography):

A diacritic in Classical Latin that resembles and gave rise to the acute.

Apex as a noun (typography):

A diacritic in Middle Vietnamese that indicates .

Crown as a noun:

A royal, imperial or princely headdress; a diadem.

Crown as a noun (heraldry):

A representation of such a headdress, as in heraldry; it may even be that only the image exists, no physical crown, as in the case of the kingdom of Belgium; by analogy such crowns can be awarded to moral persons that don't even have a head, as the mural crown for cities in heraldry

Crown as a noun:

A wreath or band for the head, especially one given as reward of victory or a mark of honor.

Crown as a noun (by extension):

Any reward of victory or mark of honor.

Crown as a noun:

Imperial or regal power, or those who wield it.

Crown as a noun (metonym):

The sovereign (in a monarchy), as head of state.

Crown as a noun (by extension, especially in, _, legal):

The state, the government (headed by a monarch).

Crown as a noun:

The top part of something: The topmost part of the head. The highest part of a hill. The top section of a hat, above the brim. The raised centre of a road. The highest part of an arch. The upper range of facets in a rose diamond. The dome of a furnace.

Crown as a noun (architecture):

A kind of spire or lantern formed by converging flying buttresses.

Crown as a noun:

Splendor; culmination; acme.

Crown as a noun (translation):

Any currency (originally) issued by the crown (regal power) and often bearing a crown (headdress); various currencies known by similar names in their native languages, such as the koruna, kruna, krone.

Crown as a noun (historical):

A former pre-decimalization British coin worth five shillings.

Crown as a noun (botany):

The part of a plant where the root and stem meet.

Crown as a noun (forestry):

The top of a tree.

Crown as a noun (anatomy):

The part of a tooth above the gums.

Crown as a noun (dentistry):

A prosthetic covering for a tooth.

Crown as a noun (nautical):

A knot formed in the end of a rope by tucking in the strands to prevent them from unravelling

Crown as a noun (nautical):

The part of an anchor where the arms and the shank meet

Crown as a noun (nautical):

The rounding, or rounded part, of the deck from a level line.

Crown as a noun (nautical, in the plural):

The bights formed by the turns of a cable.

Crown as a noun (paper):

In England, a standard size of printing paper measuring 20 × 15 inches.

Crown as a noun (paper):

In American, a standard size of writing paper measuring 19 × 15 inches.

Crown as a noun (chemistry):

A monocyclic ligand having three or more binding sites, capable of holding a guest in a central location

Crown as a noun (medical):

During childbirth, the appearance of the baby's head from the mother's vagina

Crown as a noun (firearms):

A rounding or smoothing of the barrel opening

Crown as a noun (geometry):

The area enclosed between two concentric perimeters.

Crown as a noun (religion):

A round spot shaved clean on the top of the head, as a mark of the clerical state; the tonsure.

Crown as a noun:

A whole turkey with the legs and wings removed to produce a joint of white meat.

Crown as a noun (AAVE, colloquial):

A formal hat worn by women to Sunday church services; a church crown.

Crown as a noun:

The knurled knob or dial, on the outside of a watch case, used to wind it or adjust the hands

Crown as an adjective:

Of, related to, or pertaining to a crown.

Crown as an adjective:

Of, related to, pertaining to the top of a tree or trees.

Crown as a verb:

To place a crown on the head of.

Crown as a verb:

To formally declare (someone) a king, queen, emperor, etc.

Crown as a verb:

To bestow something upon as a mark of honour, dignity, or recompense; to adorn; to dignify.

Crown as a verb:

To form the topmost or finishing part of; to complete; to consummate; to perfect.

Crown as a verb:

To declare (someone) a winner.

Crown as a verb (medicine):

Of a baby, during the birthing process; for the surface of the baby's head to appear in the vaginal opening.

Crown as a verb (transitive):

To cause to round upward; to make anything higher at the middle than at the edges, such as the face of a machine pulley.

Crown as a verb:

To hit on the head.

Crown as a verb (video games):

To shoot an opponent in the back of the head with a shotgun in a first-person shooter video game.

Crown as a verb (board games):

In checkers, to stack two checkers to indicate that the piece has become a king.

Crown as a verb (firearms):

To widen the opening of the barrel.

Crown as a verb (military):

To effect a lodgment upon, as upon the crest of the glacis, or the summit of the breach.

Crown as a verb (nautical):

To lay the ends of the strands of (a knot) over and under each other.

Crown as a verb (archaic):