tump over vs overturn

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

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

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

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

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

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

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

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

tump over (verb)	overturn (verb)
cause to overturn from an upright or normal position	change radically
turn 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