Synonyms of the word

onerousness

• n. The state or characteristic of being onerous.

burdensomeness

• n. The state or quality of being burdensome.

difficultness

• n. The state or quality of being difficult.

difficulty

• n. The state of being difficult, or hard to do.
• n. An obstacle that hinders achievement of a goal.
• n. Physical danger from the environment, especially with risk of drowning.

heaviness

• n. The state of being heavy; weight, weightiness, force of impact or gravity.
• n. (obsolete) Oppression; dejectedness, sadness.

oppressiveness

• n. The characteristic of being oppressive.