cant vs cant over

cant is a noun but cant over is not a noun.

Word	Noun	Adjective	Verb	Adverb
cant	Yes	No	Yes	No
cant over	No	No	Yes	No

As verbs, cant and cant over are synonyms defined as:

Other synonyms of cant include pitch, slant, tilt.

cant (noun)	cant over (noun)
two surfaces meeting at an angle different from 90 degrees
a characteristic language of a particular group (as among thieves)
stock phrases that have become nonsense through endless repetition
insincere talk about religion or morals
a slope in the turn of a road or track; the outside is higher than the inside in order to reduce the effects of centrifugal force

cant (verb)	cant over (verb)
heel over	heel over