Difference between Coexistent and Synchronic

COEXISTENT vs SYNCHRONIC: NOUN

Relating to the study of a language at only one point in its history.
Occurring at a specific point in time.
Of or relating to the study of phenomena, such as linguistic features, or of events of a particular time, without reference to their historical context.
Synchronous.
Occurring or existing at the same time or having the same period or phase
(of taxa) occurring in the same period of geological time
Concerned with phenomena (especially language) at a particular period without considering historical antecedents

Intracerebral, Hemolytic, Neoplastic, Valvular, Monogenic, Akinetic, Granulomatous, Gastroduodenal, Posttraumatic, Synovial, Hyperplastic, Osteoid, Synchronal, Synchronous, Synchronic

At the same time, Coinciding, Coincidental, Concurrent, Coincident, Contemporaneous, Synchronized, Coexisting, Parallel, Simultaneous, Descriptive, Contemporary, Synchronous, Coexistent, Coeval

Intracerebral, Hemolytic, Neoplastic, Valvular, Monogenic, Akinetic, Granulomatous, Gastroduodenal, Posttraumatic, Synovial, Hyperplastic, Osteoid, Synchronal, Synchronous, Synchronic

Coetaneous, Coinciding, Coincidental, Concurrent, Coincident, Contemporaneous, Synchronized, Coexisting, Parallel, Simultaneous, Descriptive, Contemporary, Synchronous, Coexistent, Coeval

AIDS epidemic and because efforts control sexual addiction are often confounded by coexistent problems.
Behavioral activation of a breast cancerpatient with coexistent major depression and generalized anxiety disorder.
Finally, we did not evaluate accurate coexistent mental illness and substance use.
Prevalence is highest in coexistent headache, followed by pure TTH and migraine.
Fatal pancarditis in a patient with coexistent Lyme disease and babesiosis.
Clinical management and diagnostic possibilities in hydatidiform mole with coexistent fetus.
Robots and humans working together to ensure a coexistent future.
ALS patient require pain medications except for unrelated, coexistent conditions.
Femoral facial syndrome: a case report with coexistent hydrocephaly.
These features were those of coexistent leishmaniasis and KS.

First, is it necessary that the perceptualaccount of assimilation have some synchronic counterpart?
Stephen Evans, The English language in Hong Kong: Diachronic and synchronic perspectives.
An introduction to synchronic linguistic analysis, with structural problems in natural languages.
INTRODUCTION Many studies on medical texts have taken a synchronic perspective.
Student: Two become one flesh, and that is a synchronic assessment.
Within these profile areas, both synchronic and diachronic approaches are used.
A general introduction to the synchronic and diachronic descriptions of Chinese.
Crossing linguistic boundaries: systemic, synchronic and diachronic variation in English.
Synchronic studies are, however, not concerned with historical change.
On the synchronic status of palatalization in polish.