As adjectives the difference between postimpressionist and impressionistic

is that postimpressionist is of or pertaining to postimpressionism while impressionistic is pertaining to or characterized by impressionism.

As a noun postimpressionist

is a painter of this school.

As a noun investigation is

investigation.

As a noun quartz

is (mineralogy) the most abundant mineral on the earth's surface, of chemical composition silicon dioxide, si]][[oxygen|o₂ it occurs in a variety of forms, both crystalline and amorphous found in every environment.

As a proper noun diamond is

of modern usage, from the name of the gem.

As a verb rob

is .

As a noun grab is

grave.

As adjectives the difference between melancholy and tragic

is that melancholy is affected with great sadness or depression while tragic is causing great sadness or suffering.

As nouns the difference between melancholy and tragic

is that melancholy is black bile, formerly thought to be one of the four "cardinal humours" of animal bodies while tragic is a writer of tragedy.

As an adjective tragic is

causing great sadness or suffering.

As a noun tragic is

(obsolete) a writer of tragedy.

Psychaitrist is often a misspelling of psychotherapist.

Psychaitrist has no English definition.

As a noun psychotherapist is

someone who practices psychotherapy using any acceptable method such as psychoanalysis.

As a proper noun straw is

.

As adjectives the difference between finnish and estonian

is that finnish is of or pertaining to Finland while Estonian is of, from, or pertaining to the country of Estonia, its people or their language.

As proper nouns the difference between finnish and estonian

is that finnish is the Finno-Ugric language spoken by the majority of the people living in Finland, one of the two official languages of the country (the other is Swedish) while Estonian is the Uralic language that is the official language of Estonia.

As a noun Estonian is

a person from Estonia or someone descended from such people.

As a noun police

is policy (contract of insurance).

As a verb please is

(label) to make happy or satisfy; to give pleasure to.

As an adverb please is

or please can be [http://wwwdaredictionarycom/view/dare/id_00044218].