Fervent is a related term of buoyant.

As adjectives the difference between fervent and buoyant

is that fervent is exhibiting particular enthusiasm, zeal, conviction, persistence, or belief while buoyant is having buoyancy; able to float.

Unprofitable is a related term of unsuccessful.

As adjectives the difference between unprofitable and unsuccessful

is that unprofitable is not making a profit while unsuccessful is failed, not successful.

Unpleasant is a related term of appalling.

As adjectives the difference between unpleasant and appalling

is that unpleasant is not pleasant while appalling is horrifying and astonishing.

As a verb appalling is

.

As adjectives the difference between everlasting and constant

is that everlasting is lasting or enduring forever; existing or continuing without end; immortal; eternal while constant is unchanged through time or space; permanent.

As nouns the difference between everlasting and constant

is that everlasting is an everlasting flower while constant is that which is permanent or invariable.

As adjectives the difference between spectacular and incredible

is that spectacular is amazing or worthy of special notice while incredible is too implausible to be credible; beyond belief; unbelievable.

As a noun spectacular

is a spectacular display.

As adjectives the difference between enthusiastic and aggressive

is that enthusiastic is with zealous fervor; excited, motivated while aggressive is tending or disposed to aggress; characterized by aggression; making assaults; unjustly attacking.

As nouns the difference between balcony and portico

is that balcony is an accessible structure extending from a building, especially outside a window while portico is a porch, or a small space with a roof supported by columns, serving as the entrance to a building.

Exponent is a related term of propagator.

As nouns the difference between exponent and propagator

is that exponent is one who expounds, represents or advocates while propagator is a person who disseminates news or rumour.

Remote is a related term of lonely.

As adjectives the difference between remote and lonely

is that remote is at a distance; disconnected while lonely is unhappy because of feelings of loneliness.

As a noun remote

is short for remote control.

As a verb remote

is (computing) to connect to a computer from a remote location.

Gut is a synonym of boldness.

As an initialism gut

is grand unification theory.

As a noun boldness is

the state of being bold; courage.