As nouns the difference between taxonomy and brother

is that taxonomy is the science or the technique used to make a classification while brother is title of respect for an adult male member of a religious or fraternal order.

As a noun package is

something which is packed, a parcel, a box, an envelope.

As a verb package is

to pack or bundle something.

As a noun database is

(computing) a collection of (usually) organized information in a regular structure, usually but not necessarily in a machine-readable format accessible by a computer.

As a verb database is

to enter data into a database.

As a noun tribe is

a socially, ethnically, and politically cohesive group of people.

As a verb tribe is

to distribute into tribes or classes; to categorize.

As a verb be

is to exist; to have real existence.

As an abbreviation BE

is berlin, a federal state of Germany.

As a noun ach is

a name given to several species of plants; as, smallage, wild celery, parsley.

As a proper noun ACH is

initialism of Automated Clearing House|lang=en, an electronic banking network often used for direct deposit and electronic bill payment.

As an adjective keen is

showing a quick and ardent willingness or responsiveness, enthusiastic, eager; interested, intense.

As a verb keen is

(rare) to sharpen; to make cold or keen can be to utter a keen.

As a noun keen is

a prolonged wail for a deceased person.

As an adjective pretty is

cunning; clever, skilful.

As an adverb pretty is

somewhat, fairly, quite; sometimes also (by meiosis) very.

As a noun pretty is

something that is pretty.

As a verb pretty is

to make pretty; to beautify.

As adjectives the difference between adjuvant and excipient

is that adjuvant is helping; helpful; assisting. {{defdt|from 16th c.} while excipient is taking an exception.

As nouns the difference between adjuvant and excipient

is that adjuvant is someone who helps or facilitates; an assistant, a helper. {{defdt|from 16th c.} while excipient is an ingredient that is intentionally added to a drug for purposes other than the therapeutic or diagnostic effect at the intended dosage.

As a noun believer is

a person who believes; especially regarding religion.

As nouns the difference between namesake and food

is that namesake is one who is named after another or for whom another is named while food is (uncountable) any substance that can be consumed by living organisms, especially by eating, in order to sustain life.

As a verb namesake

is to name (somebody) after somebody else.