Synonyms of the word

tranquil

• adj. Free from emotional or mental disturbance.
• adj. Calm; without motion or sound.

calm

• adj. (of a person) Peaceful, quiet, especially free from anger and anxiety.
• adj. (of a place or situation) Free of noise and disturbance.
• adj. (of water) with little waves on the surface.
• adj. Without wind or storm.
• n. (in a person) The state of being calm; peacefulness; absence of worry, anger, fear or other strong negative…
• n. (in a place or situation) The state of being calm; absence of noise and disturbance.
• n. A period of time without wind.
• v. (transitive) To make calm.
• v. (intransitive) To become calm.

composed

• adj. showing composure.
• v. simple past tense and past participle of compose.

placid

• adj. calm and quiet; peaceful; tranquil.

quiet

• adj. With little or no sound; free of disturbing noise.
• adj. Having little motion or activity; calm.
• adj. Not busy, of low quantity.
• adj. Not talking much or not talking loudly; reserved.
• adj. Not showy; undemonstrative.
• adj. (software) Requiring little or no interaction.
• v. To become quiet, silent, still, tranquil, calm.
• v. To cause someone to become quiet.
• n. The absence of sound; quietness.
• n. the absence of movement; stillness, tranquility.
• interj. Be quiet.

serene

• adj. Peaceful, calm, unruffled.
• adj. Without worry or anxiety; unaffected by disturbance.
• adj. (archaic) fair and unclouded (as of the sky); clear; unobscured.
• adj. Used as part of certain titles.
• v. (transitive) To make serene.
• n. (poetic) Serenity; clearness; calmness.
• n. Evening air; night chill.
• n. A fine rain from a cloudless sky after sunset.

smooth

• adj. Having a texture that lacks friction. Not rough.
• adj. Without difficulty, problems, or unexpected consequences or incidents.
• adj. Bland; glib.
• adj. Flowing or uttered without check, obstruction, or hesitation; not harsh; fluent.
• adj. (of a person) Suave; sophisticated.
• adj. (of an action) Natural; unconstrained.
• adj. (of a motion) Unbroken.
• adj. (chiefly of water) Placid, calm.
• adj. (of an edge) Lacking projections or indentations; not serrated.
• adj. (of food or drink) Not grainy; having an even texture.
• adj. (of a beverage) Having a pleasantly rounded flavor; neither rough nor astringent.
• adj. (mathematics, of a function) Having derivatives of all finite orders at all points within the function’s…
• adj. (mathematics, of a number) That factors completely into small prime numbers.
• adj. (linguistics, classical studies, of a vowel) Lacking marked aspiration.
• adj. (of muscles, medicine) Involuntary and non-striated.
• adv. Smoothly.
• n. Something that is smooth, or that goes smoothly and easily.
• n. A smoothing action.
• n. A domestic animal having a smooth coat.
• n. A member of an anti-hippie fashion movement in 1970s Britain.
• n. (statistics) The analysis obtained through a smoothing procedure.
• v. To make smooth or even.
• v. To make straightforward.
• v. (statistics, image processing, digital audio) To capture important patterns in the data, while leaving…

still

• adj. Not moving; calm.
• adj. Not effervescing; not sparkling.
• adj. Uttering no sound; silent.
• adj. (not comparable) Having the same stated quality continuously from a past time.
• adj. Comparatively quiet or silent; soft; gentle; low.
• adj. (obsolete) Constant; continual.
• adv. Without motion.
• adv. (aspect) Up to a time, as in the preceding time.
• adv. (degree) To an even greater degree. Used to modify comparative adjectives or adverbs.
• adv. (conjunctive) Nevertheless.
• adv. (archaic, poetic) Always; invariably; constantly; continuously.
• adv. (extensive) Even, yet.
• n. A period of calm or silence.
• n. (photography) A photograph, as opposed to movie footage.
• n. (slang) A resident of the Falkland Islands.
• n. A steep hill or ascent.
• n. a device for distilling liquids.
• n. (catering) a large water boiler used to make tea and coffee.
• n. (catering) the area in a restaurant used to make tea and coffee, separate from the main kitchen.
• n. A building where liquors are distilled; a distillery.
• v. to calm down, to quiet.
• v. (obsolete) To trickle, drip.
• v. To cause to fall by drops.
• v. To expel spirit from by heat, or to evaporate and condense in a refrigeratory; to distill.

unagitated

• adj. Not agitated (physically or emotionally).

unruffled

• adj. Calm, not ruffled, serene, at peace, unbothered.