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back vs sustain

sustain vs back

back is a noun but sustain is not a noun.

back is an adjective but sustain is not an adjective.

back and sustain both are verbs.

back is an adverb but sustain is not an adverb.

Word NounAdjectiveVerbAdverb
back Yes Yes Yes Yes
sustain No No Yes No
As verbs, sustain is a hypernym of back; that is, sustain is a word with a broader meaning than back:
  • back: establish as valid or genuine
  • sustain: establish or strengthen as with new evidence or facts
Other hypernyms of back include affirm, confirm, corroborate, substantiate, support.
back (noun) sustain (noun)
(American football) the position of a player on a football team who is stationed behind the line of scrimmage
the side that goes last or is not normally seen
a support that you can lean against while sitting
the part of a garment that covers the back of your body
the protective covering on the front, back, and spine of a book
the posterior part of a human (or animal) body from the neck to the end of the spine
the series of vertebrae forming the axis of the skeleton and protecting the spinal cord
the part of something that is furthest from the normal viewer
(football) a person who plays in the backfield
back (adjective) sustain (adjective)
related to or located at the back
of an earlier date
located at or near the back of an animal
back (verb) sustain (verb)
establish as valid or genuine undergo (as of injuries and illnesses)
strengthen by providing with a back or backing establish or strengthen as with new evidence or facts
shift to a counterclockwise direction admit as valid
place a bet on supply with necessities and support
travel backward provide with nourishment
cause to travel backward be the physical support of; carry the weight of
support financial backing for lengthen or extend in duration or space
be behind; approve of
give support or one's approval to
be in back of
back (adverb) sustain (adverb)
at or to or toward the back or rear
in or to or toward a past time
in repayment or retaliation
in or to or toward a former location
in or to or toward an original condition
in reply
Difference between back and sustain

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