Adverb
synchronically (not comparable)
In a synchronic way; at the same time.
Morphological effects Although umlaut was not a grammatical process, umlauted vowels often serve to distinguish grammatical forms (and thus show similarities to ablaut when viewed synchronically), as can be seen in the English word man. Source: Internet
This is, however, not the case today (synchronically) and also never has been (diachronically). Source: Internet