Aquarist rhymes with:
barest, embarrassed, merest, rarest, terraced, armbrust, barest, buttressed, dearest, deforest, direst, embarrassed, florist, forest, forrest, guitarist, interest, jurist, laforest, merest, nearest, noninterest, pendergrast, psychiatrist, purest, rainforest, rarest, reforest, severest, terraced, tourist
Aquarist sounds like:
accessorized, aggregate, aggregated, agresta, agresti, ashurst