emulsion vs colloid

emulsion and colloid both are nouns.

Word	Noun	Adjective	Verb	Adverb
emulsion	Yes	No	No	No
colloid	Yes	No	No	No

As nouns, colloid is a hypernym of emulsion; that is, colloid is a word with a broader meaning than emulsion:

emulsion: (chemistry) a colloid in which both phases are liquids
colloid: a mixture with properties between those of a solution and fine suspension

emulsion (noun)	colloid (noun)
a light-sensitive coating on paper or film; consists of fine grains of silver bromide suspended in a gelatin	a mixture with properties between those of a solution and fine suspension
(chemistry) a colloid in which both phases are liquids