alteration vs retardation

retardation vs alteration

alteration and retardation both are nouns.

Word	Noun	Adjective	Verb	Adverb
alteration	Yes	No	No	No
retardation	Yes	No	No	No

As nouns, retardation is a hyponym of alteration; that is, retardation is a word with a more specific, narrower meaning than alteration:

alteration: an event that occurs when something passes from one state or phase to another
retardation: a decrease in rate of change

Other hyponyms of alteration include acceleration, deceleration, slowing, avulsion, break, mutation, sublimation, surprise, birth, nascence, nascency, nativity, breakup, detachment, separation, vagary, fluctuation, variation, conversion, death, decease, expiry, decrease, drop-off, lessening, destabilization, increase, easing, moderation, relief, deformation, transition, shift, transformation, transmutation, scintillation, sparkling, twinkle, play, shimmer, transmutation, damage, harm, impairment, development, revolution, chromosomal mutation, genetic mutation, mutation, sex change, loss of consciousness.

alteration (noun)	retardation (noun)
the act of revising or altering (involving reconsideration and modification)	the act of slowing down or falling behind
the act of making something different (as e.g. the size of a garment)	a decrease in rate of change
an event that occurs when something passes from one state or phase to another	lack of normal development of intellectual capacities
	any agent that retards or delays or hinders
	the extent to which something is delayed or held back

Difference between alteration and retardation

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