As adjectives the difference between calamitous and deplorable

is that calamitous is concerning or involving calamity, disastrous while deplorable is deserving strong condemnation; shockingly bad.

Decisive is a related term of obligatory.

As adjectives the difference between decisive and obligatory

is that decisive is while obligatory is imposing obligation, morally or legally; binding.

As adjectives the difference between impolitic and careless

is that impolitic is not in accordance with good policy; unwise, inexpedient; unadvisable while careless is free from care; unworried, without anxiety.

Vigorous is a related term of prompt.

As adjectives the difference between vigorous and prompt

is that vigorous is physically strong and active while prompt is (archaic) ready, willing (to act).

As a noun prompt is

a reminder or cue.

As a verb prompt is

to lead someone toward what they should say or do.

Used is a related term of obsolete.

As adjectives the difference between used and obsolete

is that used is that is or has or have been used while obsolete is obsolete, deprecated (computing).

As a verb used

is (use).

Trail is a related term of slide.

As a proper noun trail

is a city in british columbia.

As a verb slide is

(ergative) to (cause to) move in continuous contact with a surface.

As a noun slide is

an item of play equipment that children can climb up and then slide down again.

Animated is a related term of curious.

As adjectives the difference between animated and curious

is that animated is endowed with life; full of life or spirit; indicating animation; lively; vigorous while curious is (lb) fastidious, particular; demanding a high standard of excellence, difficult to satisfy.

As a verb animated

is (animate).

Rugged is a related term of artless.

As adjectives the difference between rugged and artless

is that rugged is broken into sharp or irregular points; uneven; not smooth; rough or rugged can be having a rug or rugs while artless is having or displaying no guile, cunning, or deceit.

As a verb rugged

is (rug).

Hasten is a related term of urge.

As nouns the difference between hasten and urge

is that hasten is while urge is gopher (a small burrowing furry rodent).

Encourage is a related term of exhilarate.

As verbs the difference between encourage and exhilarate

is that encourage is while exhilarate is (archaic) to make happy, cheer up; to gladden.