As a proper noun piston

is .

As a noun plug is

(electricity) a pronged connecting device which fits into a mating socket.

As a verb plug is

to stop with a plug; to make tight by stopping a hole.

As nouns the difference between love and amity

is that love is money while amity is (formal|literary) friendship the cooperative and supportive relationship between people, or animals in this sense, the term connotes a relationship which involves mutual knowledge, esteem, affection, and respect along with a degree of rendering service to friends in times of need or crisis.

As verbs the difference between relied and relying

is that relied is (rely) while relying is .

As an adverb how

is to what degree.

As a noun how

is the means by which something is accomplished or how can be (dialectal) an artificial barrow or tumulus.

As a conjunction how

is in which way; in such way.

As an interjection how

is .

As nouns the difference between coziness and cosy

is that coziness is the state or quality of being cozy while cosy is a padded or knit covering put on an item to keep it warm, especially a teapot or egg.

As an adjective cosy is

affording comfort and warmth; snug; social.

As a verb cosy is

to become snug and comfortable.

As nouns the difference between serve and book

is that serve is (sports) an act of putting the ball or shuttlecock in play in various games while book is book.

As a verb serve

is to provide a service .

As an adjective interstate

is (chiefly|us|and|australia) of, or relating to two or more states.

As an adverb interstate

is (chiefly|us|and|australia) crossing states (usually provincial state, but also eg multinational sense).

As a noun interstate

is (us) a freeway that is part of the.

As an initialism nfs is

network file system.

As nouns the difference between zoo and circus

is that zoo is a park where live animals are exhibited while circus is a traveling company of performers that may include acrobats, clowns, trained animals, and other novelty acts, that gives shows usually in a circular tent.

As a pronoun man

is i.

As a proper noun chicken is

a cdp in alaska.

As verbs the difference between jacketing and lagging

is that jacketing is present participle of lang=en while lagging is present participle of lang=en.

As an adjective lagging is

falling behind, not keeping up the pace.

As a noun lagging is

the covering of something with strips of felt, wood etc, either as insulation or for protection.