The difference between Apex and Peak

When used as nouns, apex means the "highest" or the greatest point of something, whereas peak means a point.

Peak is also verb with the meaning: to reach a highest degree or maximum.

Peak is also adjective with the meaning: bad.

check bellow for the other definitions of Apex and Peak

Apex as a noun:

The "highest" or the greatest point of something.

Examples:

"the apex of the building"
Apex as a noun (figuratively):

The moment of greatest success, expansion, etc.

Examples:

"the apex of civilization"
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 .

Peak as a noun:

A point; the sharp end or top of anything that terminates in a point; as, the peak, or front, of a cap.
Peak as a noun:

The highest value reached by some quantity in a time period.

Examples:

"synonyms: apex pinnacle Thesaurus:apex"

"The stock market reached a peak in September 1929."
Peak as a noun (geography):

The top, or one of the tops, of a hill, mountain, or range, ending in a point.

Examples:

"synonyms: summit top"

"They reached the peak after 8 hours of climbing."
Peak as a noun (geography):

The whole hill or mountain, especially when isolated.
Peak as a noun (nautical):

The upper aftermost corner of a fore-and-aft sail.

Examples:

"'peak-halyards"

"'peak-brails"
Peak as a noun (nautical):

The narrow part of a vessel's bow, or the hold within it.
Peak as a noun (nautical):

The extremity of an anchor fluke; the bill.
Peak as a noun (mathematics):

A local maximum of a function, e.g. for sine waves, each point at which the value of y is at its maximum.

Peak as a verb:

To reach a highest degree or maximum.

Examples:

"Historians argue about when the Roman Empire began to peak and ultimately decay."
Peak as a verb:

To rise or extend into a peak or point; to form, or appear as, a peak.
Peak as a verb (nautical, transitive):

To raise the point of (a gaff) closer to perpendicular.

Peak as a verb (intransitive):

To become sick or wan.
Peak as a verb (intransitive):

To acquire sharpness of figure or features; hence, to look thin or sickly.
Peak as a verb (intransitive):

To pry; to peep slyly.

Examples:

"rfquotek Shakespeare"