As nouns the difference between rulebook and manual

is that rulebook is a book containing rules while manual is a handbook.

As an adjective manual is

performed with the hands (of an activity).

As a proper noun Manual is

a given name derived from Spanish: a rare spelling variant of Manuel, sometimes considered erratic.

As adjectives the difference between playful and sincere

is that playful is liking play, prone to play frequently, such as a child or kitten; rather sportive while sincere is genuine; meaning what one says or does; heartfelt.

As a noun bowl

is a roughly hemispherical container used to hold, mix or present food, such as salad, fruit or soup, or other items or bowl can be the ball rolled by players in the game of lawn bowls.

As a verb bowl

is (label) to roll or throw (a ball) in the correct manner in cricket and similar games and sports.

As a proper noun glass is

.

As nouns the difference between pens and markers

is that pens is plural of lang=en while markers is plural of lang=en.

As verbs the difference between pens and markers

is that pens is third-person singular of pen while markers is third-person singular of marker.

As verbs the difference between deplane and deboard

is that deplane is to disembark from an airplane while deboard is to exit a form of transportation such as a boat, ship, airplane, trolley, streetcar or spaceship.

As an adverb indirectly

is in an indirect manner.

As an adjective circuitous is

not direct or to the point.

As a proper noun hammers

is (usually "the hammers").

As a noun shampoo is

shampoo (product for washing hair).

As a verb defending

is .

As an adjective defensive is

.

In countable terms the difference between redaction and obfuscation

is that redaction is the change or changes made while editing while obfuscation is a single instance of intentionally obscuring the meaning of something to make it more difficult to grasp.

In uncountable terms the difference between redaction and obfuscation

is that redaction is the process of editing or censoring while obfuscation is confusion, bewilderment, or a baffled state resulting from something obfuscated, or made more opaque and muddled with the intent to obscure information.

As adverbs the difference between distinctly and discriminately

is that distinctly is in a distinct manner while discriminately is in a discriminating manner; distinctly.