firmly

As an adverb firmly

is in a firm or definite or strong manner.

As an adjective farmly is

of, pertaining to, or resembling a farm.

As adverbs the difference between rigidly and firmly

is that rigidly is in a rigid manner; stiffly while firmly is in a firm or definite or strong manner.

As adverbs the difference between certainly and firmly

is that certainly is in a way which is certain; with certainty while firmly is in a firm or definite or strong manner.

As a noun taxonomy

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

As an adverb firmly is

in a firm or definite or strong manner.

As adverbs the difference between surely and firmly

is that surely is without fail while firmly is in a firm or definite or strong manner.

As adverbs the difference between surly and firmly

is that surly is (obsolete) in an arrogant or supercilious manner while firmly is in a firm or definite or strong manner.

As an adjective surly

is (obsolete) lordly, arrogant, supercilious.

As adverbs the difference between firmly and torely

is that firmly is in a firm or definite or strong manner while torely is (dialectal|or|obsolete) with difficulty; hardly; stoutly; firmly.

As adverbs the difference between firmly and resolvedly

is that firmly is in a firm or definite or strong manner while resolvedly is (obsolete) so as to resolve or clear up difficulties; clearly.