Guardian is a synonym of watchdog.

As nouns the difference between guardian and watchdog

is that guardian is guardian while watchdog is a guard dog.

As a verb watchdog is

to perform a function analogous to that of a watchdog; to guard and warn.

As nouns the difference between prediction and idea

is that prediction is a statement of what will happen in the future while idea is an abstract archetype of a given thing, compared to which real-life examples are seen as imperfect approximations; pure essence, as opposed to actual examples.

Hunt is a related term of tracking.

As a proper noun hunt

is for a hunter (for game, birds etc).

As a verb tracking is

.

As a noun tracking is

the act by which something is tracked.

Wreath is a related term of circlet.

As nouns the difference between wreath and circlet

is that wreath is something twisted, intertwined, or curled while circlet is a small circle.

As a verb wreath

is to place an entwined circle of flowers upon or around something.

Sagacious is a related term of learned.

As adjectives the difference between sagacious and learned

is that sagacious is having or showing keen discernment, sound judgment, and farsightedness; mentally shrewd while learned is (poetic).

Anaemic is a related term of cadaverous.

As adjectives the difference between anaemic and cadaverous

is that anaemic is (british spelling) while cadaverous is corpselike; hinting of death; imitating a cadaver.

As a noun anaemic

is (british spelling).

Trend is a related term of mood.

As a noun trend

is trend.

As an adjective mood is

tired.

Obscene is a related term of nefarious.

As adjectives the difference between obscene and nefarious

is that obscene is obscene while nefarious is sinful, villainous, criminal, or wicked, especially when noteworthy or notorious for such characteristics.

Hard is a related term of baffling.

As nouns the difference between hard and baffling

is that hard is stove, heater; an enclosed space in which fuel (usually wood) is burned to provide heating, usually for cooking while baffling is an act of foiling or thwarting.

As a verb baffling is

.

As an adjective baffling is

puzzling and frustrating.

As nouns the difference between convenience and pleasure

is that convenience is the quality of being suitable, useful or convenient while pleasure is a state of being pleased.

As an interjection pleasure is

pleased to meet you.

As a verb pleasure is

to give or afford pleasure to; to please; to gratify.