solemn

Solemn is a related term of weighty.

As adjectives the difference between solemn and weighty

is that solemn is deeply serious and somber while weighty is having weight; heavy; ponderous; as, a weighty body.

Magnificent is a related term of solemn.

As adjectives the difference between magnificent and solemn

is that magnificent is grand, elegant or splendid in appearance while solemn is deeply serious and somber.

Pious is a related term of solemn.

As adjectives the difference between pious and solemn

is that pious is of or pertaining to piety, exhibiting piety, devout, godfearing while solemn is deeply serious and somber.

As adjectives the difference between calm and solemn

is that calm is peaceful, quiet, especially free from anger and anxiety while solemn is deeply serious and somber.

As a noun calm

is the state of being calm; peacefulness; absence of worry, anger, fear or other strong negative emotion.

As a verb calm

is to make calm.

Solemn is a related term of punctilious.

As adjectives the difference between solemn and punctilious

is that solemn is deeply serious and somber while punctilious is strictly attentive to detail; meticulous or fastidious, particularly to codes or conventions.

As adjectives the difference between festive and solemn

is that festive is having the atmosphere, decoration, or attitude of a festival, holiday, or celebration while solemn is deeply serious and somber.

As adjectives the difference between urbane and solemn

is that urbane is (of a man) courteous, polite, refined, and suave while solemn is deeply serious and somber.

As adjectives the difference between solemn and stately

is that solemn is deeply serious and somber while stately is of people: regal, dignified; worthy of respect.

As an adverb stately is

in a stately manner.

As adjectives the difference between solemn and sad

is that solemn is deeply serious and somber while sad is sated, having had one's fill; satisfied, weary.

As an acronym SAD is

seasonal affective disorder.

As adjectives the difference between solemn and seldom

is that solemn is deeply serious and somber while seldom is (obsolete) rare; infrequent.

As an adverb seldom is

infrequently, rarely.