As nouns the difference between kidney and pronephros

is that kidney is an organ in the body that filters the blood, producing urine while pronephros is (anatomy) a primitive kidney in the lamprey and similar animals, and in other vertebrate embryos.

As nouns the difference between lamprey and pronephros

is that lamprey is any long slender primitive eel-like freshwater and saltwater fish of the Petromyzontidae family, having a sucking mouth with rasping teeth but no jaw while pronephros is a primitive kidney in the lamprey and similar animals, and in other vertebrate embryos.

As nouns the difference between embryo and pronephros

is that embryo is while pronephros is (anatomy) a primitive kidney in the lamprey and similar animals, and in other vertebrate embryos.

As nouns the difference between professional and shamateur

is that professional is a person who belongs to a profession while shamateur is a sportsman who is officially an amateur but who makes money from playing, or who otherwise behaves as a professional.

As an adjective professional

is of, pertaining to, or in accordance with the (usually high) standards of a profession.

As nouns the difference between pig and grice

is that pig is any of several mammalian species of the genus Sus, having cloven hooves, bristles and a nose adapted for digging; especially the domesticated farm animal Sus scrofa while grice is a pig, especially a young pig, or its meat; sometimes specifically, a breed of wild pig or boar native to Scotland, now extinct.

As verbs the difference between pig and grice

is that pig is to give birth while grice is to act as a trainspotter; to partake in the activity or hobby of trainspotting.

As an acronym PIG

is persuade Identify GOTV, electoral technique commonly employed in the United Kingdom.

As nouns the difference between boar and grice

is that boar is a wild boar (sus scrofa ), the wild ancestor of the domesticated pig while grice is a pig, especially a young pig, or its meat; sometimes specifically, a breed of wild pig or boar native to scotland, now extinct or grice can be (obsolete) a gree; a step.

As a verb grice is

(uk|rail transport|slang) to act as a trainspotter; to partake in the activity or hobby of trainspotting.

As an adjective extinct

is (dated) extinguished, no longer alight (of fire, candles etc).

As a noun grice is

a pig, especially a young pig, or its meat; sometimes specifically, a breed of wild pig or boar native to scotland, now extinct or grice can be (obsolete) a gree; a step.

As a verb grice is

(uk|rail transport|slang) to act as a trainspotter; to partake in the activity or hobby of trainspotting.

As nouns the difference between trainspotter and grice

is that trainspotter is a person whose hobby is train spotting while grice is a pig, especially a young pig, or its meat; sometimes specifically, a breed of wild pig or boar native to scotland, now extinct or grice can be (obsolete) a gree; a step.

As a verb grice is

(uk|rail transport|slang) to act as a trainspotter; to partake in the activity or hobby of trainspotting.

As nouns the difference between trainspotting and grice

is that trainspotting is while grice is a pig, especially a young pig, or its meat; sometimes specifically, a breed of wild pig or boar native to scotland, now extinct or grice can be (obsolete) a gree; a step.

As a verb grice is

(uk|rail transport|slang) to act as a trainspotter; to partake in the activity or hobby of trainspotting.

Gricer is a related term of grice.

As nouns the difference between gricer and grice

is that gricer is (informal) a railway enthusiast while grice is a pig, especially a young pig, or its meat; sometimes specifically, a breed of wild pig or boar native to scotland, now extinct or grice can be (obsolete) a gree; a step.

As a verb grice is

(uk|rail transport|slang) to act as a trainspotter; to partake in the activity or hobby of trainspotting.