tranquil

As adjectives the difference between tranquil and impassive

is that tranquil is free from emotional or mental disturbance while impassive is having, or revealing, no emotion.

Tranquil is a related term of insensitive.

As adjectives the difference between tranquil and insensitive

is that tranquil is free from emotional or mental disturbance while insensitive is not expressing normal physical feeling.

As adjectives the difference between tranquil and spiritless

is that tranquil is free from emotional or mental disturbance while spiritless is lacking energy, drive, motivation or emotion. Enervated.

Tranquil is a related term of unflappable.

As adjectives the difference between tranquil and unflappable

is that tranquil is free from emotional or mental disturbance while unflappable is remaining composed and level-headed at all times; unswayed by adversity or excitement; impossible to fluster; not becoming frustrated or irritated easily.

As an adjective tranquil

is free from emotional or mental disturbance.

As a proper noun serenity is

in general use since the 1990s.

Smooth is a related term of tranquil.

As adjectives the difference between smooth and tranquil

is that smooth is having a texture that lacks friction not rough while tranquil is free from emotional or mental disturbance.

As an adverb smooth

is smoothly.

As a noun smooth

is something that is , or that goes smoothly and easily.

As a verb smooth

is to make smooth or even.

Tranquil is a related term of sunny.

As adjectives the difference between tranquil and sunny

is that tranquil is free from emotional or mental disturbance while sunny is (of weather or a day) featuring a lot of sunshine.

As an adverb sunny is

(us|regional) sunny side up.

As a noun sunny is

a sunfish.

Tranquil is a related term of stoical.

As adjectives the difference between tranquil and stoical

is that tranquil is free from emotional or mental disturbance while stoical is enduring pain and hardship without showing feeling or complaint.

Eventempered is a related term of tranquil.

As an adjective tranquil is

free from emotional or mental disturbance.

Phlegmatic is a synonym of tranquil.

As adjectives the difference between phlegmatic and tranquil

is that phlegmatic is not easily excited to action or passion; calm; sluggish while tranquil is free from emotional or mental disturbance.

As a noun phlegmatic

is one who has a phlegmatic disposition.