Synonyms of the word

rudimentary

• adj. Of or relating to one or more rudiments.
• adj. Basic; minimal; with less than, or only the minimum, necessary.
• n. (zoology, usually in the plural) One of the rudimentary mammae of boars.

basic

• adj. Necessary, essential for life or some process.
• adj. Elementary, simple, fundamental, merely functional.
• adj. (chemistry) Of or pertaining to a base; having a pH greater than 7.
• adj. (slang) Unremarkable or uninteresting; boring; uncool.
• n. A necessary commodity, a staple requirement.
• n. An elementary building block, e.g. a fundamental piece of knowledge.
• n. (military) Basic training.

fundamental

• n. (usually in the plural) A leading or primary principle, rule, law, or article, which serves as the groundwork…
• n. (physics) The lowest frequency of a periodic waveform.
• n. (music) The lowest partial of a complex tone.
• adj. Pertaining to the foundation or basis; serving for the foundation.
• adj. Essential, as an element, principle, or law; important; original; elementary.

incomplete

• adj. Not complete; not filled up; not finished; not having all its parts, or not having them all adjusted;…
• adj. (botany) Of a flower, wanting any of the usual floral organs.
• n. Something incomplete.
• n. A designation of being incomplete.

uncomplete

• adj. Obsolete form of incomplete.

underlying

• adj. lying underneath.
• adj. basic or fundamental.
• adj. implicit.
• n. (finance) The entity from whose performance a derivative derives its value.

undeveloped

• adj. not developed or used.
• adj. not built on, unbuilt; not ready for building on.
• adj. lagging behind others, especially in economic or social matters.

vestigial

• adj. Of or pertaining to a vestige or remnant; like a trace from the past.
• adj. Not fully developed in mature animals.
• n. (biology) A small, degenerate, or imperfectly developed part or organ which has been more fully developed…