protested

As verbs the difference between challenged and protested

is that challenged is (challenge) while protested is (protest).

As an adjective challenged

is lacking some physical or mental attribute or skill; used after adverbs to make politically correct adjectives.

As verbs the difference between protested and complained

is that protested is (protest) while complained is (complain).

As verbs the difference between insisted and protested

is that insisted is past tense of insist while protested is past tense of protest.

As verbs the difference between rebelled and protested

is that rebelled is (rebel) while protested is (protest).

As verbs the difference between protested and grumble

is that protested is (protest) while grumble is to make a low, growling or rumbling noise, like a hungry stomach or certain animals.

As a noun grumble is

(onomatopoeia) a low thundering, rumbling or growling sound.

As a noun terms

is .

As a verb protested is

(protest).

As verbs the difference between protested and pretested

is that protested is past tense of protest while pretested is past tense of pretest.

As verbs the difference between protested and protected

is that protested is (protest) while protected is (protect).

As an adjective protected is

defended.

As a noun protester

is one who protests, either singly or in a public display of group feeling.

As a verb protested is

past tense of protest.