Only
At most
Synonyms: At most, (only) just, as little as, not until, scarcely, narrowly, by the skin of one's teeth, solely, uniquely, at best, no/not more than, no longer ago than, barely, hardly, by a hair's breadth, exclusively, entirely, and wholly.
Sole
Synonyms: Sole, one (and only), lone, only possible, exclusive, single, solitary, unique, and individual.
Example Sentences
She only wanted to help.
This is the only option.
He only eats vegetarian food.
They only arrived yesterday evening.
I only need five minutes.