Synonyms for «substantial work»

Synonyms for individual words can be found below.

But the house also required substantial work in order for it to meet local building codes. (realtormag.realtor.org)
As you review them, you'll see that there are creative ways to compensate for a lack of substantial work experience. (thebalance.com)
Most of these organizations do substantial work on farm animal advocacy. (animalcharityevaluators.org)
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