Synonyms of the word

substandard

• adj. Of inferior quality; not meeting the minimum quality requirements.

deficient

• adj. Lacking something essential; often construed with in.
• adj. Insufficient or inadequate in amount.
• adj. (mathematics) Of a number n, Having the sum of divisors σ(n)<2n, or, equivalently, the sum of proper…

inferior

• adj. of lower quality.
• adj. of lower rank.
• adj. located below.
• adj. (botany) Situated below some other organ; said of a calyx when free from the ovary, and therefore below…
• adj. (botany) On the side of a flower which is next to the bract; anterior.
• adj. (astronomy) Nearer to the Sun than the Earth is.
• adj. (astronomy) Below the horizon.
• n. a person of lower stature to another.

nonstandard

• adj. Not standard.
• adj. (linguistics) Not conforming to the language as used by the majority of its speakers.
• n. Something that is not standard.