HONE means to sharpen. You hone your skills or hone a blade.
HOME as a verb means to aim or move toward a target: The satellite camera homed in on the desert encampment.
IMPLY means to hint at something without specifically stating it:
Felicia’s looks implied that she did not admire my new haircut.
INFER means to deduce, to figure out. I inferred from Felicia’s looks that she didn’t like my new haircut.
FARTHER refers to a greater distance or time: By moving farther from the city, they hoped their money would go farther.
FURTHER is used to express additional efforts beyond those already accomplished: All corporations should set as a goal further increasing customer satisfaction.
FOUNDER as a verb means to fail or degrade: Harry’s efforts to buy a new business foundered because of his credit history.
FLOUNDER is also a verb and means to struggle helplessly, either physically or mentally. Picture a flounder (the fish) flopping around on deck: Elena stammered and floundered when she was given an assignment in which she had no interest.