substandard

As adjectives the difference between excellent and substandard

is that excellent is of the highest quality; splendid while substandard is of inferior quality; not meeting the minimum quality requirements.

As an adverb excellent

is (obsolete) excellently.

Contaminated is a related term of substandard.

As adjectives the difference between contaminated and substandard

is that contaminated is adulterated; impure while substandard is of inferior quality; not meeting the minimum quality requirements.

As a verb contaminated

is (contaminate).

As adjectives the difference between substandard and outrageous

is that substandard is of inferior quality; not meeting the minimum quality requirements while outrageous is cruel, violating morality or decency; provoking indignation or affront.

Substandard is a related term of nefarious.

As adjectives the difference between substandard and nefarious

is that substandard is of inferior quality; not meeting the minimum quality requirements while nefarious is sinful, villainous, criminal, or wicked, especially when noteworthy or notorious for such characteristics.

Harmful is a related term of substandard.

As adjectives the difference between harmful and substandard

is that harmful is of a kind likely to be damaging; injurious while substandard is of inferior quality; not meeting the minimum quality requirements.

Substandard is a related term of disagreeable.

As adjectives the difference between substandard and disagreeable

is that substandard is of inferior quality; not meeting the minimum quality requirements while disagreeable is not agreeable, conformable, or congruous; contrary; unsuitable.

As a noun disagreeable is

something displeasing; anything that is disagreeable.

Substandard is a related term of nasty.

As adjectives the difference between substandard and nasty

is that substandard is of inferior quality; not meeting the minimum quality requirements while nasty is .

As a noun nasty is

(lb) something nasty.

Substandard is a related term of deplorable.

As adjectives the difference between substandard and deplorable

is that substandard is of inferior quality; not meeting the minimum quality requirements while deplorable is lamentable, regrettable.

Substandard is a related term of horrible.

As adjectives the difference between substandard and horrible

is that substandard is of inferior quality; not meeting the minimum quality requirements while horrible is causing horror; terrible; shocking.

As a noun horrible is

a thing that causes horror; a terrifying thing, particularly a prospective bad consequence asserted as likely to result from an act.

Substandard is a related term of putrid.

As adjectives the difference between substandard and putrid

is that substandard is of inferior quality; not meeting the minimum quality requirements while putrid is rotting, rotten, being in a state of putrefaction.