nonionic vs unionised

nonionic and unionised both are adjectives.

Word	Noun	Adjective	Verb	Adverb
nonionic	No	Yes	No	No
unionised	No	Yes	No	No

As adjectives, nonionic and unionised are synonyms defined as:

Other synonyms of nonionic include nonionised, nonionized, unionized.

nonionic (adjective)	unionised (adjective)
not converted into ions	not converted into ions
not ionic	being a member of or formed into a labor union