eighteen (cardinal number)

achtzehn (a) (cardinal number)

Achtzehn (n) [f.] (cardinal number)

dix-huit (a) [m.] (cardinal number)

dix-huit (n) [m.] (cardinal number)

diciotto (a) [m.] (cardinal number)

diciotto (n) [m.] (cardinal number)

dieciocho (a) [m.] (cardinal number)

dieciocho (n) [m.] (cardinal number)

achttien (a) [m.] (cardinal number)

achttien (n) [m.] (cardinal number)

arton (invariable) (n) (cardinal number)

arton (a) (cardinal number)

dezoito (a) [m.] (cardinal number)

dezoito (n) [m.] (cardinal number)