A synonym for changable is adaptable.
A synonym for common noun is word.
A synonym for debris is garbage. An antonym for debris is cleanliness.
A synonym for the word "sensor" is "detector".
a synonym is like more than one word that means the same thing
A synonym for the season Autumn is Fall.
fall
plummet drop
fall
crashdroploweringdwindledraw backtumbleeasecollapsedecrease
water fall
descend,go down,fall,sink
movement, moving, locomotion, rise and fall, shifiting
Wave, swell, surge, rise and fall...
Surge, ripple, wave, swell, flow, rise and fall...
decrease, fade, lessen, fall, Or: deny, reject, refuse
break, separate, split up, fall apart, come apart