Maintain is a related term of absorb.

As verbs the difference between maintain and absorb

is that maintain is (obsolete|transitive) to support (someone), to back up or assist (someone) in an action while absorb is to include so that it no longer has separate existence; to overwhelm; to cause to disappear as if by swallowing up; to incorporate; to assimilate; to take in and use up .

Disturbance is a related term of mania.

As a noun disturbance

is the act of disturbing, being disturbed.

As a proper noun mania is

(roman mythology) the goddess of the dead and ghosts.

Fancy is a related term of plan.

As nouns the difference between fancy and plan

is that fancy is the imagination while plan is a tablet (for writing and erasing).

As an adjective fancy

is decorative.

As a verb fancy

is (formal) to appreciate without jealousy or greed.

Glow is a related term of heyday.

As nouns the difference between glow and heyday

is that glow is the state of a glowing object while heyday is a period of success, popularity, or power; prime.

As a verb glow

is to give off light from heat or to emit light as if heated.

As an interjection heyday is

a lively greeting.

Dull is a related term of coarse.

As adjectives the difference between dull and coarse

is that dull is lacking the ability to cut easily; not sharp while coarse is composed of large parts or particles; of inferior quality or appearance; not fine in material or close in texture.

As a verb dull

is to render dull; to remove or blunt an edge or something that was sharp.

Toddle is a related term of streak.

As verbs the difference between toddle and streak

is that toddle is to walk unsteadily, as a small child does while streak is to have or obtain streaks.

As a noun streak is

an irregular line left from smearing or motion.

Harebrain is a related term of cretin.

As a noun cretin is

idiot, fool, bastard, fuckwit etc.

As an adjective cretin is

stupid; idiotic; foolish etc.

Mutter is a related term of sigh.

As nouns the difference between mutter and sigh

is that mutter is while sigh is a deep and prolonged audible inspiration or respiration of air, as when fatigued, frustrated, grieved, or relieved; the act of sighing.

As a verb sigh is

to inhale a larger quantity of air than usual, and immediately expel it; to make a deep single audible respiration, especially as the result or involuntary expression of fatigue, exhaustion, grief, sorrow, frustration, or the like.

As an interjection sigh is

an expression of fatigue, exhaustion, grief, sorrow, frustration, or the like, often used in casual written contexts.

Ungainly is a related term of inelegant.

As adjectives the difference between ungainly and inelegant

is that ungainly is clumsy; lacking grace while inelegant is inelegant (not elegant).

Giddiness is a related term of facility.

As nouns the difference between giddiness and facility

is that giddiness is the state of being giddy while facility is the fact of being easy, or easily done; absence of difficulty, simplicity.