reconstruction vs fixing

reconstruction and fixing both are nouns.

Word	Noun	Adjective	Verb	Adverb
reconstruction	Yes	No	No	No
fixing	Yes	No	No	No

As nouns, fixing is a hypernym of reconstruction; that is, fixing is a word with a broader meaning than reconstruction:

Other hypernyms of reconstruction include fix, fixture, mend, mending, repair, reparation.

reconstruction (noun)	fixing (noun)
the activity of constructing something again	the act of putting something in working order again
recall that is hypothesized to work by storing abstract features which are then used to construct the memory during recall	the sterilization of an animal
an interpretation formed by piecing together bits of evidence	(histology) the preservation and hardening of a tissue sample to retain as nearly as possible the same relations they had in the living body
	restraint that attaches to something or holds something in place