disagree

As a noun disconfirmation

is (chiefly|philosophy|uncountable) introduction of evidence which conclusively establishes that a belief or hypothesis is not true or which diminishes the acceptability of a belief or hypothesis.

As a verb disagree is

to not agree (harmonize).

As a verb disagree

is to not agree (harmonize).

As an adjective critic is

critical.

As a noun critic is

critic.

As verbs the difference between disagree and contend

is that disagree is to not agree harmonize while contend is to strive in opposition; to contest; to dispute; to vie; to quarrel; to fight.

As verbs the difference between disagree and discipline

is that disagree is to not agree (harmonize) while discipline is .

As verbs the difference between abuse and disagree

is that abuse is while disagree is to not agree (harmonize).

Bicker is a synonym of disagree.

As verbs the difference between bicker and disagree

is that bicker is to quarrel in a tiresome, insulting manner while disagree is to not agree (harmonize).

As a noun bicker

is a skirmish; an encounter or bicker can be a small wooden vessel made of staves and hoops, like a tub.

As a noun opposition

is the opposition, political opposition; opposition party.

As a verb disagree is

to not agree (harmonize).

In lang=en terms the difference between disagree and discard

is that disagree is to not agree (suit) while discard is to throw away, to reject.

As verbs the difference between disagree and discard

is that disagree is to not agree (harmonize) while discard is to throw away, to reject.

As a noun discard is

anything discarded.

As verbs the difference between criticize and disagree

is that criticize is to find fault (with something) while disagree is to not agree (harmonize).

As a noun altercation

is warm contention in words; dispute carried on with heat or anger; controversy; wrangle; wordy contest.

As a verb disagree is

to not agree (harmonize).