gradation control
131chain — Synonyms and related words: Alps, Andes, Caucasus, Himalayas, Indian file, Kekule formula, Oregon boat, Rockies, accouple, accumulate, accumulative, additive, additory, agglutinate, alps on alps, alternation, amass, anchor, andiron, anklet,… …
132descent — Synonyms and related words: Brownian movement, Indian file, abasement, advance, affiliation, altitude peak, angular motion, apparentation, array, articulation, ascending, ascent, automatic control, axial motion, backflowing, backing, backset,… …
