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"Son las dos" is a phrase which is often translated as "it's two o'clock", and "dieciocho" is a noun which is often translated as "eighteen". Learn more about the difference between "son las dos" and "dieciocho" below.
son las dos(
sohn
 
lahs
 
dohs
)
A phrase is a group of words commonly used together (e.g., once upon a time).
phrase
a. it's two o'clock
¡Ya son las dos y todavía no he empezado a hacer la comida!It's two o'clock already, and I haven't started making lunch yet!
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el dieciocho(
dyeh
-
see
-
oh
-
choh
)
An adjective is a word that describes a noun (e.g., the big dog).
adjective
a. eighteen
Voy por la página dieciocho.I'm on page eighteen.
A masculine noun is used with masculine articles and adjectives (e.g., el hombre guapo, el sol amarillo).
masculine noun
a. eighteen
Nueve por dos son dieciocho.Nine times two is eighteen.
b. eighteenth (in dates)
Su cumpleaños es el dieciocho de mayo.Her birthday is on the eighteenth of May.
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