As adjectives the difference between expert and senior

is that expert is extraordinarily capable or knowledgeable while senior is older; superior.

As nouns the difference between expert and senior

is that expert is a person with extensive knowledge or ability in a given subject while senior is someone seen as deserving respect or reverence because of their age.

As nouns the difference between alteration and transition

is that alteration is alteration while transition is the process of change from one form, state, style or place to another.

As a verb transition is

to make a.

As nouns the difference between dejection and despair

is that dejection is a state of melancholy or depression; low spirits, the blues while despair is loss of hope; utter hopelessness; complete despondency.

As a verb despair is

to give up as beyond hope or expectation; to despair of.

Degection is likely misspelled.

Degection has no English definition.

As a verb despair is

to give up as beyond hope or expectation; to despair of.

As a noun despair is

loss of hope; utter hopelessness; complete despondency.

As adjectives the difference between unhappy and pleasant

is that unhappy is not happy; sad while pleasant is giving pleasure; pleasing in manner.

As a noun pleasant is

(obsolete) a wit; a humorist; a buffoon.

As nouns the difference between maneuver and strategy

is that maneuver is a movement, often one performed with difficulty while strategy is the science and art of military command as applied to the overall planning and conduct of warfare.

As a verb maneuver

is to move (something) carefully, and often with difficulty, into a certain position.

As adjectives the difference between kindhearted and prodigious

is that kindhearted is having an innately kind disposition or character while prodigious is very big in size or quantity; gigantic; colossal; huge.

As adjectives the difference between kindhearted and loyal

is that kindhearted is having an innately kind disposition or character while loyal is having or demonstrating undivided and constant support for someone or something.

As a proper noun Loyal is

a town in Oklahoma.

As a noun cone

is cone.

As a proper noun cave is

.

As an adjective biconcave

is having both sides concave.

As a proper noun cave is

.