Synonyms and Antonyms for hard-on

1. on (adv.)

with a forward motion

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5. hard (adv.)

with effort or force or vigor

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6. on (adj.)

in operation or operational

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7. hard (adj.)

very strong or vigorous

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8. hard-on (n.)

an erect penis

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9. hard (adv.)

with firmness

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10. hard (adj.)

characterized by effort to the point of exhaustion; especially physical effort

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