pestiferous

As adjectives the difference between pestiferous and morbific

is that pestiferous is containing organisms that cause contagious diseases while morbific is that causes disease; sickening, pathogenic.

As adjectives the difference between rancorous and pestiferous

is that rancorous is full of rancor; bitter; unforgiving while pestiferous is containing organisms that cause contagious diseases.

Wikidiffcom is likely misspelled.

Wikidiffcom has no English definition.

As an adjective pestiferous is

containing organisms that cause contagious diseases.

As adjectives the difference between pestiferous and estiferous

is that pestiferous is containing organisms that cause contagious diseases while estiferous is an alternative spelling of aestiferous.

As adjectives the difference between aestiferous and pestiferous

is that aestiferous is “Turbulent as the tide”; “ebbing and flowing as the tide”.An Universal Etymological English Dictionary by Nathan Bailey (1731),
ÆSTIʹFEROUS [æstifer, L.] ebbing and flowing as the tide while pestiferous is containing organisms that cause contagious diseases.

As a noun taxonomy

is the science or the technique used to make a classification.

As an adjective pestiferous is

containing organisms that cause contagious diseases.