As nouns the difference between irregularity and fad

is that irregularity is an instance of being irregular while fad is a phenomenon that becomes popular for a very short time.

Diminition is a related term of shrinkage.

As a noun shrinkage is

the act of shrinking, or the proportion by which something shrinks.

Primitive is a synonym of introductory.

As adjectives the difference between primitive and introductory

is that primitive is of or pertaining to the beginning or origin, or to early times; original; primordial; primeval; first while introductory is introducing; giving a preview or idea of.

As a noun primitive

is an original or primary word; a word not derived from another, as opposed to (derivative).

Beat is a related term of trill.

As verbs the difference between beat and trill

is that beat is while trill is to create a trill sound; to utter trills or a trill; to play or sing in tremulous vibrations of sound; to have a trembling sound; to quaver.

As a noun trill is

(music) a rapid alternation between an indicated note and the one above it, in musical notation usually indicated with the letters tr written above the staff.

As adjectives the difference between professed and manifest

is that professed is professing to be qualified while manifest is evident to the senses, especially to the sight; apparent; distinctly perceived.

As verbs the difference between professed and manifest

is that professed is past tense of profess while manifest is to show plainly; to make to appear distinctly, usually to the mind; to put beyond question or doubt; to display; to exhibit.

As a noun manifest is

a public declaration; an open statement; a manifesto or manifestation.

Whine is a related term of roar.

As a noun whine

is a long-drawn, high-pitched complaining cry or sound.

As a verb whine

is to utter a high-pitched cry.

As a proper noun roar is

.

As verbs the difference between evaluate and adjudge

is that evaluate is to draw conclusions from examining; to assess while adjudge is to declare to be.

As nouns the difference between shrewdness and quickness

is that shrewdness is the quality of being shrewd while quickness is rapidity of movement or activity; agility or dexterity.

Solemness is a related term of earnestness.

As nouns the difference between solemness and earnestness

is that solemness is while earnestness is the quality of being earnest; sincerity; seriousness.

Sedate is a related term of phlegmatic.

As adjectives the difference between sedate and phlegmatic

is that sedate is in a composed and temperate state while phlegmatic is not easily excited to action or passion; calm; sluggish.

As a verb sedate

is to tranquilize by giving a sedative; to calm; to soothe; to induce sleep.

As a noun phlegmatic is

one who has a phlegmatic disposition.