Arduous and Bitter

Arduous adjective - Requiring considerable physical or mental effort.

Bitter and arduous are semantically related. In some cases you can use "Bitter" instead an adjective "Arduous".

Nearby Word: arduously

Bitter adjective - Having or showing deep-seated resentment.

Arduous and bitter are semantically related. Sometimes you can use "Arduous" instead an adjective "Bitter".

Nearby Words: bitterness, bitterly, bittern, bitterish