From herd + -ful (adjective-forming suffix). <span class="searchmatch">herdful</span> (comparative more <span class="searchmatch">herdful</span>, superlative most <span class="searchmatch">herdful</span>) (obsolete) Rich in herds (of cattle etc.). 1872...
herd flerd herd behaviour herd boar herdbook herdboy herd cats herdess <span class="searchmatch">herdful</span> herdgroom herd immunity herd instinct herdless herdlike herdman herd mentality...