blithe

Energetic is a related term of blithe.

As adjectives the difference between energetic and blithe

is that energetic is possessing, exerting, or displaying energy while blithe is (dated or literary) happy, cheerful.

Blithe is a synonym of sunny.

As adjectives the difference between blithe and sunny

is that blithe is (dated or literary) happy, cheerful 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.

Blithe is a synonym of lighthearted.

As adjectives the difference between blithe and lighthearted

is that blithe is (dated or literary) happy, cheerful while lighthearted is joyful, glad, taking pleasure in being alive not depressed or sad.

As adjectives the difference between blithe and sprightly

is that blithe is dated or literary Happy, cheerful while sprightly is animated, vivacious, or gay; lively.

As an adverb sprightly is

in a lively and vigorous way.

As adjectives the difference between zestful and blithe

is that zestful is having a spirited love of life; ebullient while blithe is dated or literary Happy, cheerful.

As adjectives the difference between blithe and jocund

is that blithe is dated or literary Happy, cheerful while jocund is jovial; exuberant; lighthearted; merry and in high spirits; exhibiting happiness.

As adjectives the difference between blithe and complacent

is that blithe is dated or literary Happy, cheerful while complacent is uncritically satisfied with oneself or one's achievements; smug.

As adjectives the difference between blithe and blither

is that blithe is dated or literary Happy, cheerful while blither is comparative of blithe.

As a verb blither is

to talk foolishly; to blather.

As adjectives the difference between blithe and lithe

is that blithe is dated or literary Happy, cheerful while lithe is mild; calm.

As a verb lithe is

to go.

As a noun lithe is

shelter.

As adjectives the difference between blithe and morose

is that blithe is (dated or literary) happy, cheerful while morose is sullen]], gloomy; showing a [[brood|brooding ill humour.