Antonyms of adj pointless

2 senses of pointless

Sense 1
pointless (vs. pointed), unpointed -- (not having a point especially a sharp point; "my pencils are all pointless")

pointed (vs. pointless) -- (having a point)
        => acanthoid, acanthous, spinous -- (shaped like a spine or thorn)
        => acuate, acute, sharp, needlelike -- (ending in a sharp point)
        => barreled, barrelled -- ((of an arrow) tapered toward both ends)
        => bristle-pointed -- (pointed like bristles)
        => five-pointed -- (having five points)
        => fusiform, spindle-shaped, cigar-shaped -- (tapering at each end)
        => nibbed -- ((used of pens) having a writing point or nib especially of a certain kind; "a broad-nibbed pen")
        => peaked -- (having or rising to a peak; "the peaked ceiling"; "the island's peaked hills")
        => pyramidal, pyramidic, pyramidical -- (resembling a pyramid)
        => sharpened -- (having the point made sharp; "a sharpened pencil")
        => six-pointed -- (having six points)
        => spiked -- (having a long sharp point)
        => spikelike -- (resembling a spike)

Sense 2
otiose, pointless, purposeless, senseless, superfluous, wasted -- (serving no useful purpose; having no excuse for being; "otiose lines in a play"; "advice is wasted words"; "a pointless remark"; "a life essentially purposeless"; "senseless violence")

INDIRECT (VIA worthless) -> valuable -- (having great material or monetary value especially for use or exchange; "a valuable diamond")

Similarity of adj pointless

2 senses of pointless

Sense 1
pointless (vs. pointed), unpointed -- (not having a point especially a sharp point; "my pencils are all pointless")
       => blunt -- (having a broad or rounded end; "thick marks made by a blunt pencil")

Sense 2
otiose, pointless, purposeless, senseless, superfluous, wasted -- (serving no useful purpose; having no excuse for being; "otiose lines in a play"; "advice is wasted words"; "a pointless remark"; "a life essentially purposeless"; "senseless violence")
       => worthless (vs. valuable) -- (lacking in usefulness or value; "a worthless idler")