Adjektive
numerous [ more numerous ; most numerous]
Verb
to abound [ abounded ; abounded ]
to multiply [ multiplied ; multiplied ]
to proliferate {biol.}
كَثُرَ {أحياء}
to rise {med.}
to mount {med.}
to bilge {med.}
to swell {med.}
Noun
...
multiply {math.}
كَثَّرَ {رياضيات}