As nouns the difference between odor and cyclopentene

is that odor is any smell, whether fragrant or offensive; scent; perfume while cyclopentene is cyclopentene.

As nouns the difference between monomer and cyclopentene

is that monomer is monomer while cyclopentene is cyclopentene.

As nouns the difference between plastic and cyclopentene

is that plastic is plastic while cyclopentene is cyclopentene.

As an adjective plastic

is plastic.

As nouns the difference between auxiliary and draisine

is that auxiliary is a person or group that acts in an auxiliary manner while draisine is a light auxiliary rail vehicle (train) or tram.

As an adjective auxiliary

is helping; giving assistance or support.

As nouns the difference between rail and draisine

is that rail is a horizontal bar extending between supports and used for support or as a barrier; a railing while draisine is a light auxiliary rail vehicle (train) or tram.

As a verb rail

is to travel by railway.

As nouns the difference between train and draisine

is that train is elongated portion while draisine is a light auxiliary rail vehicle (train) or tram.

As a verb train

is to practice an ability.

As nouns the difference between tram and draisine

is that tram is beam (large piece of timber or iron) while draisine is a light auxiliary rail vehicle (train) or tram.

Handcar is a hyponym of draisine.

As nouns the difference between handcar and draisine

is that handcar is a light railroad car propelled by a hand-operated pumping mechanism while draisine is a light auxiliary rail vehicle (train) or tram.

As adjectives the difference between secrete and merocrine

is that secrete is separated while merocrine is of or pertaining to certain exocrine glands that secrete without major damage to the secretory cells.

As a verb secrete

is to extract a substance from blood, sap, or similar to produce and emit waste for excretion or for the fulfilling of a physiological function.

As nouns the difference between opaque and opacification

is that opaque is an area of darkness; a place or region with no light while opacification is the action of making something opaque or cloudy.

As an adjective opaque

is neither reflecting nor emitting light.

As a verb opaque

is to make, render (more) opaque.