Similar words
soltura
soltura implies ease or fluidity of movement or speech, natural ease; fluidez is more specifically linguistic fluency, like fluency in a language.
Similar in other languages
French
aisance à l'oral
aisance à l'oral is the French word for the same thing — both mean "fluency."
Portuguese
fluência
fluência is the Portuguese word for the same thing — both mean "fluency."
Practice
1 What does fluidez mean?
fluency
2 Fill the gap: Habla con ___.
Full sentence: Habla con fluidez. (She speaks fluently.)
3 Which fingerprint chart matches fluidez?
fluidez: neutral register, common frequency, general domain, neutral connotation.