Few and Only a few

Few adjective - A quantifier that can be used with count nouns and is often preceded by `a'; a small but indefinite number.

Only a few and few are semantically related in assorted topic. In some cases you can use "Only a few" instead an adjective "Few".

Few and only a few are semantically related in assorted topic. You can use "Few" instead an adjective phrase "Only a few".