tip over vs overturn

tip over is not a noun while overturn is a noun.

Word	Noun	Adjective	Verb	Adverb
tip over	No	No	Yes	No
overturn	Yes	No	Yes	No

As verbs, tip over and overturn are synonyms defined as:

Other synonyms of tip over include tump over, turn over.

As verbs, tip over and overturn are synonyms defined as:

tip over and overturn: cause to overturn from an upright or normal position

Other synonyms of tip over include bowl over, knock over, tump over, turn over, upset.

tip over (noun)	overturn (noun)
	the act of upsetting something
	an improbable and unexpected victory

tip over (verb)	overturn (verb)
turn from an upright or normal position	change radically
cause to overturn from an upright or normal position	rule against
	cancel officially
	turn from an upright or normal position
	cause to overturn from an upright or normal position
	cause the downfall of; of rulers