remark vs kibitz

remark is a noun but kibitz is not a noun.

Word	Noun	Adjective	Verb	Adverb
remark	Yes	No	Yes	No
kibitz	No	No	Yes	No

As verbs, kibitz is a hyponym of remark; that is, kibitz is a word with a more specific, narrower meaning than remark:

Other hyponyms of remark include criticise, criticize, knock, pick apart, wisecrack, kibbitz.

remark (noun)	kibitz (noun)
explicit notice
a statement that expresses a personal opinion or belief or adds information

remark (verb)	kibitz (verb)
make mention of	make unwanted and intrusive comments
make or write a comment on