obliterate vs slur

obliterate is not a noun while slur is a noun.

Word	Noun	Adjective	Verb	Adverb
obliterate	No	Yes	Yes	No
slur	Yes	No	Yes	No

As verbs, slur is a hypernym of obliterate; that is, slur is a word with a broader meaning than obliterate:

Other hypernyms of obliterate include blur, dim.

obliterate (noun)	slur (noun)
	a blemish made by dirt
	a disparaging remark
	(music) a curved line spanning notes that are to be played legato

obliterate (adjective)	slur (adjective)
reduced to nothingness

obliterate (verb)	slur (verb)
remove completely from recognition or memory	become vague or indistinct
make undecipherable or imperceptible by obscuring or concealing	utter indistinctly
mark for deletion, rub off, or erase	speak disparagingly of; e.g., make a racial slur
do away with completely, without leaving a trace	play smoothly or legato