The simple way to use a lot of custom stemming words in solr we can implement the StemmerOverrideFilterFactory and the schema of the field using that will look like the following
< filter class="solr.StemmerOverrideFilterFactory" dictionary="stemdict.txt" />
< filter class="solr.PorterStemFilterFactory" />
The dictionary stemdict.txt must look like
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# test that we can override the stemming algorithm with our own mappings
# these must be tab-separated
# some crazy ones that a stemmer would never do
Note:while giving the stem substitute words it must be separated by a tab space