comment vs kibitz

comment is a noun but kibitz is not a noun.

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

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

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

comment (noun)	kibitz (noun)
a statement that expresses a personal opinion or belief or adds information
a written explanation or criticism or illustration that is added to a book or other textual material
a report (often malicious) about the behavior of other people

comment (verb)	kibitz (verb)
make or write a comment on	make unwanted and intrusive comments
provide interlinear explanations for words or phrases
explain or interpret something