As adjectives the difference between helpless and happy

is that helpless is unable to defend oneself or to act without help while happy is experiencing the effect of favourable fortune; having the feeling arising from the consciousness of well-being or of enjoyment; enjoying good of any kind, as peace, tranquillity, comfort; contented; joyous.

As nouns the difference between peg and plug

is that peg is a cylindrical wooden or metal object used to fasten or as a bearing between objects while plug is a pronged connecting device which fits into a mating socket.

As verbs the difference between peg and plug

is that peg is to fasten using a peg while plug is to stop with a plug; to make tight by stopping a hole.

As a proper noun Peg

is a diminutive of the female given names Peggy and Margaret.

As nouns the difference between panel and panels

is that panel is panel while panels is .

As adjectives the difference between rational and hierarchical

is that rational is capable of reasoning while hierarchical is pertaining to a hierarchy.

As a noun rational

is a rational number: a number that can be expressed as the quotient of two integers.

As adjectives the difference between bureaucratic and hierarchical

is that bureaucratic is of or pertaining to bureaucracy or the actions of bureaucrats while hierarchical is pertaining to a hierarchy.

As nouns the difference between chilling and meditation

is that chilling is the act by which something is chilled while meditation is meditation.

As an adjective chilling

is becoming cold.

As a verb chilling

is .

As adjectives the difference between bureaucratic and rational

is that bureaucratic is of or pertaining to bureaucracy or the actions of bureaucrats while rational is capable of reasoning.

As a noun rational is

a rational number: a number that can be expressed as the quotient of two integers.

As a noun systems

is .

As an adjective hierarchical is

pertaining to a hierarchy.

As nouns the difference between systems and rational

is that systems is while rational is (mathematics) a rational number: a number that can be expressed as the quotient of two integers.

As an adjective rational is

capable of reasoning.

As a noun systems

is .

As an adjective bureaucratic is

of or pertaining to bureaucracy or the actions of bureaucrats.