do in vs neutralise

do in and neutralise both are verbs.

Word	Noun	Adjective	Verb	Adverb
do in	No	No	Yes	No
neutralise	No	No	Yes	No

As verbs, do in and neutralise are synonyms defined as:

do in and neutralise: get rid of (someone who may be a threat) by killing

Other synonyms of do in include knock off, liquidate, neutralize, waste.

do in (verb)	neutralise (verb)
get rid of (someone who may be a threat) by killing	make chemically neutral
	make ineffective by counterbalancing the effect of
	make incapable of military action
	get rid of (someone who may be a threat) by killing