As a noun glum

is light.

As an adjective unhappy is

not happy; sad.

As verbs the difference between engrossing and captivating

is that engrossing is present participle of engross while captivating is present participle of lang=en.

As adjectives the difference between engrossing and captivating

is that engrossing is utterly consuming one's time and attention while captivating is that captivates; fascinating.

As a noun engrossing

is the act of one who engrosses, or buys up wholesale.

As adjectives the difference between wearisome and tiring

is that wearisome is tiresome, tedious or causing fatigue while tiring is that tires or tire.

As a verb tiring is

.

As a noun tiring is

(uncountable) action of the verb to tire .

As verbs the difference between clamour and complain

is that clamour is while complain is to express feelings of pain, dissatisfaction, or resentment.

As a noun clamour

is .

As verbs the difference between encompass and included

is that encompass is to form a circle around; to encircle while included is past tense of include.

As nouns the difference between groundswell and upheaval

is that groundswell is (nautical) a broad undulation of the open ocean, often as the result of a distant disturbance while upheaval is the process of being heaved upward, especially the raising of part of the earth's crust.

As nouns the difference between haustorium and appressoria

is that haustorium is a root of a parasitic plant modified to take nourishment from its host while appressoria is plural of lang=en.

As a proper noun perch

is .

As an acronym put is

(software|testing).

As an initialism put is

(electronics).

As verbs the difference between dabble and try

is that dabble is to partially wet (something) by splashing or dipping; connotes playfulness while try is to attempt; to endeavour. Followed by infinitive.

As a noun try is

an attempt.

As an adjective try is

fine, excellent.

As verbs the difference between embellish and titivate

is that embellish is to make more beautiful and attractive; to decorate while titivate is to make small improvements or alterations to (one's appearance etc); to add some finishing touches to.