obliterate vs obliterator

obliterate is not a noun while obliterator is a noun.

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

obliterate (noun)	obliterator (noun)
	an eliminator that does away with all traces

obliterate (adjective)	obliterator (adjective)
reduced to nothingness

obliterate (verb)	obliterator (verb)
remove completely from recognition or memory
make undecipherable or imperceptible by obscuring or concealing
mark for deletion, rub off, or erase
do away with completely, without leaving a trace