As a noun standby is

state of readiness without being immediately involved.

As a verb standby is

.

As adjectives the difference between spindly and weakened

is that spindly is characteristic of a spindle; slender and of weak appearance while weakened is reduced, made less strong.

As a verb weakened is

(weaken).

Stuborness is often a misspelling of stubborn.

Stuborness has no English definition.

As an adjective stubborn

is refusing to move or to change one's opinion; obstinate; firmly resisting.

As adjectives the difference between essential and valuable

is that essential is necessary while valuable is having a great value.

As nouns the difference between essential and valuable

is that essential is a necessary ingredient while valuable is a personal possession such as jewellery, of relatively great monetary value; — usually used in plural form.

As verbs the difference between strike and egg

is that strike is to delete or cross out; to scratch or eliminate while egg is to throw eggs at or egg can be to encourage, incite.

As nouns the difference between strike and egg

is that strike is (baseball) a status resulting from a batter swinging and missing a pitch, or not swinging at a pitch in the strike zone, or hitting a foul ball that is not caught while egg is (zoology|countable) an approximately spherical or ellipsoidal body produced by birds, snakes, insects and other animals, housing the embryo during its development.

As a verb appease

is to make quiet; to calm; to reduce to a state of peace; to dispel (anger or hatred).

As a noun hunger is

hunger.

As verbs the difference between endorse and authorize

is that endorse is to support, to back, to give one's approval to, especially officially or by signature while authorize is to grant (someone) the permission or power necessary to do (something).

As a noun endorse

is a diminutive of the pale, usually appearing in pairs on either side of a pale.

As nouns the difference between walnut and almonds

is that walnut is a hardwood tree of the genus juglans while almonds is .

As an adjective walnut

is having a dark brown colour, the colour of walnut wood.

Osobar is likely misspelled.

Osobar has no English definition.

As a noun isotherm is

a line of equal or constant temperature on a graph or chart, such as a weather map.

As an adjective insubordinate

is rebellious or defiant to authority.

As a noun mutiny is

an organized rebellion against a legally constituted authority, especially by seamen against their officers.

As a verb mutiny is

to commit mutiny.