meddle vs tamper

meddle is not a noun while tamper is a noun.

Word	Noun	Adjective	Verb	Adverb
meddle	No	No	Yes	No
tamper	Yes	No	Yes	No

As verbs, meddle and tamper are synonyms defined as:

meddle and tamper: intrude in other people's affairs or business; interfere unwantedly

meddle (noun)	tamper (noun)
	a tool for tamping (e.g., for tamping tobacco into a pipe bowl or a charge into a drill hole etc.)

meddle (verb)	tamper (verb)
intrude in other people's affairs or business; interfere unwantedly	play around with or alter or falsify, usually secretively or dishonestly
	intrude in other people's affairs or business; interfere unwantedly