vocabulary

As a noun vocabulary

is a usually alphabetized and explained collection of words eg of a particular field, or prepared for a specific purpose, often for learning.

As a adjective lexical is

(linguistics) concerning the vocabulary, words or morphemes of a language.

Lexicon is a coordinate term of vocabulary.

As nouns the difference between vocabulary and lexicon

is that vocabulary is a usually alphabetized and explained collection of words eg of a particular field, or prepared for a specific purpose, often for learning while lexicon is the vocabulary of a language.

Vocabulary is a related term of voice.

As nouns the difference between vocabulary and voice

is that vocabulary is a usually alphabetized and explained collection of words eg of a particular field, or prepared for a specific purpose, often for learning while voice is sound uttered by the mouth, especially that uttered by human beings in speech or song; steven; sound thus uttered considered as possessing some special quality or character; as, the human voice'; a pleasant '''voice'''; a low ' voice .

As a verb voice is

to give utterance or expression to; to utter; to publish; to announce; to divulge; as, to voice the sentiments of the nation.

As a noun vocabulary

is a usually alphabetized and explained collection of words eg of a particular field, or prepared for a specific purpose, often for learning.

As a proper noun Khmer is

the national language of cambodia part of the mon-khmer language family.

As nouns the difference between vocabulary and language

is that vocabulary is a usually alphabetized and explained collection of words eg of a particular field, or prepared for a specific purpose, often for learning while language is (countable) a form of communication using words either spoken or gestured with the hands and structured with grammar, often with a writing system.

As a verb language is

to communicate by language; to express in language.

Dictionary is a coordinate term of vocabulary.

Vocabulary is a see also of dictionary.

As nouns the difference between vocabulary and dictionary

is that vocabulary is a usually alphabetized and explained collection of words eg of a particular field, or prepared for a specific purpose, often for learning while dictionary is a reference work with a list of words from one or more languages, normally ordered alphabetically and explaining each word's meaning and sometimes containing information on its etymology, usage, translations{{,}} and other data.

As a verb dictionary is

(label) to look up in a dictionary.