Fast:

• Sreesanth is a fast bowler. (adj.)
• She was driving too fast. (adv.)

Overnight:

• We made an overnight stay at a relative’s house. (adj.)
• Her business was an overnight success. (adj.)
• We stayed overnight at a relative’s house. (adv.)

Straight:

• Draw a straight line below the mark. (adj.)
• He went straight into the principal’s chamber. (adv.)

Late:

• The minister’s late arrival raised public protest. (adj.)
• The minister arrived late for the function. (adv.)

Outright:

• His request received an outright refusal. (adj.)
• His request was refused outright. (adv.)

Early:

• She ate an early supper since she had to travel by 7 O’ clock train. (adj.)
• I get up early in the morning. (adv.)

Upstairs:

• He’s upstairs cleaning up his bedroom. (adj.)
• He went upstairs to clean up his bedroom. (adv.)

Hard:

• This is a hard problem. (adj.)
• He is working very hard. (adv.)