As nouns the difference between hydrogen and arylene

is that hydrogen is the lightest chemical element (symbol h) with an atomic number of 1 and atomic weight of 100794 while arylene is (organic chemistry) any bivalent radical produced by removal of two hydrogen atoms from the benzene ring of an aromatic compound.

In organic chemistry|lang=en terms the difference between aromatic and arylene

is that aromatic is (organic chemistry) derived from benzene while arylene is (organic chemistry) any bivalent radical produced by removal of two hydrogen atoms from the benzene ring of an aromatic compound.

As nouns the difference between aromatic and arylene

is that aromatic is a fragrant plant or spice added to a dish to flavour it while arylene is (organic chemistry) any bivalent radical produced by removal of two hydrogen atoms from the benzene ring of an aromatic compound.

As an adjective aromatic

is fragrant or spicy.

As nouns the difference between ulster and ultonian

is that ulster is a heavy overcoat manufactured from wool or another heavy material, often called a great coat; it sometimes features an attached shoulder cape covering the back and sleeves which can sometimes be buttoned in front while Ultonian is a native or inhabitant of Ulster; an Ulsterman.

As a proper noun Ulster

is the northern province of Ireland, made up of six Northern Irish counties and three counties in the Republic of Ireland.

As an adjective Ulster

is relating to, or originating from Ulster.

As nouns the difference between ulsterman and ultonian

is that ulsterman is any male coming from or living in the northern Irish province of Ulster while Ultonian is a native or inhabitant of Ulster; an Ulsterman.

As nouns the difference between mustard and dijon

is that mustard is a plant of certain species of the genus brassica'', or of related genera (especially ''sinapis alba , in the family brassicaceae, with yellow flowers, and linear seed pods while dijon is dijon mustard, a prepared mustard containing white wine in place of vinegar.

As an adjective mustard

is of a dark yellow colour.

As nouns the difference between vinegar and dijon

is that vinegar is (uncountable) a sour liquid formed by the fermentation of alcohol used as a condiment or preservative; a dilute solution of acetic acid while dijon is dijon mustard, a prepared mustard containing white wine in place of vinegar.

As a verb vinegar

is to season with vinegar .

As nouns the difference between positron and negatron

is that positron is while negatron is electron.

As adjectives the difference between environmental and polyphenic

is that environmental is pertaining to one's environment while polyphenic is (genetics) having multiple phenotypes that can arise as a result of differing environmental conditions.

Polyphenism is a related term of polyphenic.

In genetics|lang=en terms the difference between polyphenism and polyphenic

is that polyphenism is (genetics) the development of multiple, discrete phenotypes from a single genotype by organisms living in different environmental conditions while polyphenic is (genetics) having multiple phenotypes that can arise as a result of differing environmental conditions.

As a noun polyphenism

is (genetics) the development of multiple, discrete phenotypes from a single genotype by organisms living in different environmental conditions.

As an adjective polyphenic is

(genetics) having multiple phenotypes that can arise as a result of differing environmental conditions.

As a noun swamp

is a piece of wet, spongy land; low ground saturated with water; soft, wet ground which may have a growth of certain kinds of trees, but is unfit for agricultural or pastoral purposes.

As a verb swamp

is to drench or fill with water.

As an adjective paludicolous is

that lives in swamps or marshes.