nostalgic

As adjectives the difference between bittersweet and nostalgic

is that bittersweet is both bitter and sweet while nostalgic is nostalgic.

As a noun bittersweet

is a vine, of the genus , having small orange fruits that open to reveal red seeds.

As adjectives the difference between classic and nostalgic

is that classic is of or relating to the first class or rank, especially in literature or art while nostalgic is nostalgic.

As a noun classic

is a perfect and/or early example of a particular style.

As adjectives the difference between nostalgic and elegiac

is that nostalgic is of, having, or relating to nostalgia while elegiac is of, or relating to an elegy.

As nouns the difference between nostalgic and elegiac

is that nostalgic is a person who displays nostalgia for something while elegiac is a poem composed in the couplet style of classical elegies: a line of dactylic hexameter followed by a line of dactylic pentameter.

As nouns the difference between forays and nostalgic

is that forays is plural of foray while nostalgic is a person who displays nostalgia for something.

As a verb forays

is third-person singular of foray.

As an adjective nostalgic is

of, having, or relating to nostalgia.

As adjectives the difference between nostalgic and elated

is that nostalgic is nostalgic while elated is extremely happy and excited; delighted; pleased.

As a verb elated is

(elate).

As adjectives the difference between nostalgic and melancholy

is that nostalgic is nostalgic while melancholy is affected with great sadness or depression.

As a noun melancholy is

(historical) black bile, formerly thought to be one of the four "cardinal humours" of animal bodies.

As an adjective nostalgic is

nostalgic.

As adjectives the difference between nostalgic and sorrowful

is that nostalgic is nostalgic while sorrowful is of a person, full of sorrow; exhibiting sorrow; sad; dejected; distressed; distraught.

As adjectives the difference between nostalgic and mnemonic

is that nostalgic is nostalgic while mnemonic is of or relating to mnemonics: the study of techniques for remembering anything more easily.

As a noun mnemonic is

anything (especially something in verbal form) used to help remember something.

As an adjective nostalgic

is nostalgic.

As a noun daydreamer is

one who daydreams.