Antonyms of adj profitless

1 sense of profitless

Sense 1
profitless -- (without profit or reward; "let us have no part in profitless quarrels"- D.D.Eisenhower; "How weary, flat, stale, and unprofitable / Seem to me all the uses of this world"- Shakespeare)

INDIRECT (VIA unrewarding) -> rewarding -- (providing personal satisfaction; "a rewarding career as a paramedic")

Similarity of adj profitless

1 sense of profitless

Sense 1
profitless -- (without profit or reward; "let us have no part in profitless quarrels"- D.D.Eisenhower; "How weary, flat, stale, and unprofitable / Seem to me all the uses of this world"- Shakespeare)
       => unrewarding (vs. rewarding) -- (not rewarding; not providing personal satisfaction)