plateau /platˈō or pla-tōˈ/

1. A large level tract of elevated land, a tableland
2. A temporary stable state reached in the course of upward progress
3. The part of a curve representing this
4. An ornamented tray, plate, or plaque
5. A lady's flat-topped hat

To reach a level, even out (sometimes with out)

• high-flier
• high-fliers
• high-flown
• high-flyer
• high-flying
• high frequency
• high-functioning
• high gear
• high-gear
• High German
• high-grade
• high-graded
• high-grades
• high-grading
• high-gravel-blind
• high-grown
• high hand
• high-handed
• high-handedness
• high hands
• high-hat
• high-hats
• high-hatted
• high-hatting
• high-hearted