remark vs slam

remark and slam both are nouns.

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

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

remark: a statement that expresses a personal opinion or belief or adds information
slam: an aggressive remark directed at a person like a missile and intended to have a telling effect

remark (noun)	slam (noun)
explicit notice	an aggressive remark directed at a person like a missile and intended to have a telling effect
a statement that expresses a personal opinion or belief or adds information	winning all or all but one of the tricks in bridge
	a forceful impact that makes a loud noise
	the noise made by the forceful impact of two objects