As nouns the difference between promises and pledge

is that promises is plural of lang=en while pledge is a solemn promise to do something.

As verbs the difference between promises and pledge

is that promises is third-person singular of promise while pledge is to make a solemn promise (to do something).

As adjectives the difference between ground and basic

is that ground is crushed, or reduced to small particles while basic is basic.

As a noun ground

is (senseid)(uncountable) the surface of the earth, as opposed to the sky or water or underground.

As a verb ground

is to connect (an electrical conductor or device) to a ground or ground can be (grind).

As adjectives the difference between superfluous and nonessential

is that superfluous is in excess of what is required or sufficient while nonessential is not required; not essential.

As a noun nonessential is

something that is not essential.

As nouns the difference between opinion and concern

is that opinion is opinion while concern is that which affects one's welfare or happiness.

As a verb concern is

(label) to relate or belong to; to have reference to or connection with; to affect the interest of; to be of importance to.

As a noun freight

is payment for transportation.

As a verb freight

is to transport (goods).

As an adjective afraid is

impressed with fear or apprehension; in fear.

As an adjective unjustified is

not justified.

As a noun capacity is

the ability to hold, receive or absorb.

As an adjective capacity is

filling the allotted space.

As a verb threaten

is to make a threat against someone; to use threats.

As a noun fear is

grass.

As an adjective respectable is

deserving respect.

As an adjective unrestrained is

immoderate; not restrained or held in check.