tantamount

As a verb tantamount is

(obsolete) to amount to as much; to be equivalent.

As a noun tantamount is

(obsolete) something which has the same value or amount (as something else).

As an adjective tantamount is

equivalent in meaning or effect.

As verbs the difference between tantamount and tantalize

is that tantamount is (obsolete) to amount to as much; to be equivalent while tantalize is to tease (someone) by offering something desirable but keeping it out of reach.

As a noun tantamount

is (obsolete) something which has the same value or amount (as something else).

As an adjective tantamount

is equivalent in meaning or effect.

As adjectives the difference between quotidian and tantamount

is that quotidian is (medicine) recurring every twenty-four hours or (more generally) daily (of symptoms etc) while tantamount is equivalent in meaning or effect.

As nouns the difference between quotidian and tantamount

is that quotidian is while tantamount is (obsolete) something which has the same value or amount (as something else).

As a verb tantamount is

(obsolete) to amount to as much; to be equivalent.