asynchronous vs in series

asynchronous and in series both are adjectives.

Word	Noun	Adjective	Verb	Adverb
asynchronous	No	Yes	No	No
in series	No	Yes	No	No

asynchronous (adjective)	in series (adjective)
not synchronous; not occurring or existing at the same time or having the same period or phase	of or relating to the sequential performance of multiple operations
(digital communication) pertaining to a transmission technique that does not require a common clock between the communicating devices; timing signals are derived from special characters in the data stream itself