The actuality of the present thesis

Examples: Synthetic languages are numerous and well-attested. Most Indo-European languages, all Kartvelian languages such as Georgian, some Semitic languages such as Arabic, and many languages of the Americas, including Navajo, Nahuatl, Mohawk and Quechuaare synthetic.
More specifically, this includes Indo-European languages of the Romance family (Latin, Italian, French, Romanian, Spanish etc.), of the Germanic family (German, Swedish language etc.), of the Slavic family (Russian, Ukrainian, Polish, Czech, Slovak, Serbo-Croatian etc.), of the Indo aryan family (Sanskrit, Hindi, Persian etc.) as well as Greek, Albanian, Armenian, Latvian and Lithuanian.
However, some languages belonging to these families have become more analytic over time, like English, Afrikaans and Hebrew.
Forms of synthesis
There are several ways in which a language can exhibit synthetic characteristics:
Derivational synthesis
“In derivational synthesis, morphemes of different types (nouns, verbs, affixes, etc.) are joined to create new words. For example:
German: Auf sich tsratsmitgliederversammlung => "Supervision + council + member + assembly" meaning "meeting of members of the supervisory board" ("with" and "link" (as in link of a chain) form a derivation that is the German word for "member"; similarly, "completion", "collect" and "noun" form a derivation that means "meeting", with both "ver-" and "-ung" being bound morphemes)
Greek: υπερχοληστερολαιμία => "overmuch/high + (bile + solid + -ol(e) (chemical suffix)) + blood + -ia (abstraction -in this case disease- feminine suffix)" meaning "hypercholesterolemia", i.e. the presence of high levels of cholesterol in the blood.
Polish: przystanek => "beside-stand-little" meaning "bus stop", "tram stop", or "rail halt"
English: antidisestablishmentarianism => "against-ending-institutionalize-condition-advocate-ideology" meaning "the movement to prevent revoking the Church of England's status as the official church" (of England, Ireland, and Wales). English word chains such as child labour law may count as well, because it is merely an orthographic convention to write them as isolated words. Grammatically and phonetically they behave like one word (stress on the first syllable, plural morpheme at the end).
Russian: достопримечательность (dostoprimechatel'nost') => "Deserving (intensifying prefix)-notable-(noun suffix)" meaning "place of interest"
Georgian: gadmogwakhtunebinebdneno (gad-mo-gw-a-xtun-eb-in-eb-d-nen-o) means "They said that they would be forced by them (the others) to make someone to jump over in this direction". The word describes the whole sentence that incorporates tense, subject, object, relation between them, direction of the action, conditional and causative markers etc.”³