tenacious

As a letter s

is the letter s with a.

As an adjective tenacious is

clinging to an object or surface; adhesive.

Laborious is a related term of tenacious.

As adjectives the difference between laborious and tenacious

is that laborious is requiring much physical effort; toilsome while tenacious is clinging to an object or surface; adhesive.

As adjectives the difference between tenacious and agglutinate

is that tenacious is clinging to an object or surface; adhesive while agglutinate is united with glue or as with glue; cemented together.

As a verb agglutinate is

to unite, or cause to adhere, as with glue or other viscous substance; to unite by causing an adhesion of substances.

As a noun pertinacity

is the state or characteristic of being pertinacious.

As an adjective tenacious is

clinging to an object or surface; adhesive.

As adjectives the difference between tenacious and inveterate

is that tenacious is clinging to an object or surface; adhesive while inveterate is old; firmly established by long continuance; of long standing; obstinately deep-rooted; as, an inveterate disease; an inveterate habit.

As a verb inveterate is

(obsolete) to fix and settle by long continuance; to entrench.

As adjectives the difference between tenacious and unrelenting

is that tenacious is clinging to an object or surface; adhesive while unrelenting is not relenting; having no pity; not being or becoming lenient, mild, gentle, or merciful; unyielding; inflexibly rigid; hard; stern; cruel.

As adjectives the difference between tenacious and grounded

is that tenacious is clinging to an object or surface; adhesive while grounded is (aviation|of an airman) not allowed to fly.

As a verb grounded is

(ground).

As an adjective tenacious

is clinging to an object or surface; adhesive.

As a letter x is

the twenty-fourth letter of the.

As a symbol x is

voiceless velar fricative.

As adjectives the difference between implacable and tenacious

is that implacable is unplaceable; that cannot be put or placed while tenacious is clinging to an object or surface; adhesive.

As adjectives the difference between tenacious and heroical

is that tenacious is clinging to an object or surface; adhesive while heroical is heroic.