As nouns the difference between protestor and activist

is that protestor is an alternative spelling of lang=en while activist is one who is politically active in the role of a citizen; especially, one who campaigns for change.

As an adjective activist is

behaving as an activist.

As nouns the difference between protestors and activists

is that protestors is while activists is .

In lang=en terms the difference between pair and double

is that pair is a pair of breasts while double is to duplicate (a part) either in unison or at the octave above or below it.

In transitive terms the difference between pair and double

is that pair is to bring two (animals, notably dogs) together for mating while double is to multiply the strength or effect of by two.

In intransitive terms the difference between pair and double

is that pair is to suit; to fit, as a counterpart while double is to go or march at twice the normal speed.

As an adjective double is

made up of two matching or complementary elements.

As an adverb double is

twice over; twofold.

As verbs the difference between prison and caged

is that prison is to imprison while caged is (cage).

As a noun prison

is a place of long-term confinement for those convicted of serious crimes, or otherwise considered undesirable by the government.

As an adjective caged is

in a cage.

As adjectives the difference between reliable and firm

is that reliable is suitable or fit to be relied on; worthy of dependence or reliance; trustworthy while firm is steadfast, secure, hard (in position.

As nouns the difference between reliable and firm

is that reliable is something or someone reliable or dependable while firm is a business partnership; the name under which it trades.

As a verb firm is

to make firm or strong; fix securely.

As adjectives the difference between extralinguistic and paralinguistic

is that extralinguistic is outside the realm of linguistics while paralinguistic is pertaining to, or communicated through, paralanguage.

As nouns the difference between mistreatment and alimony

is that mistreatment is improper treatment, abuse while alimony is (legal) a court-enforced allowance made to a former spouse by a divorced or legally separated person.

As a proper noun fish

is .

As a noun hills is

.

As an adjective incognito

is without being known; in disguise; in an assumed character, or under an assumed title.

As an adverb incognito

is without revealing one's identity.

As a noun incognito

is one unknown or in disguise, or under an assumed character or name.

As a verb disguised is

past tense of disguise.

As a proper noun said

is : (l).

As a verb announced is

(announce).