interfering vs meddling

interfering is not a noun while meddling is a noun.

Word	Noun	Adjective	Verb	Adverb
interfering	No	Yes	No	No
meddling	Yes	Yes	No	No

As adjectives, interfering and meddling are synonyms defined as:

Other synonyms of interfering include busy, busybodied, meddlesome, officious.

interfering (noun)	meddling (noun)
	the act of altering something secretly or improperly

interfering (adjective)	meddling (adjective)
intrusive in a meddling or offensive manner	intrusive in a meddling or offensive manner