1. surface-active agent

noun. A chemical agent capable of reducing the surface tension of a liquid in which it is dissolved.
Synonyms
emulsifier chemical agent surfactant detergent wetting agent wetter
Antonyms
adulterating
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2. upper-level

adjective. At an elevated level in rank or importance.
Synonyms
superior high-ranking high-level
Antonyms
inferior worst subordinate low

3. surface

noun. (ˈsɝːfəs) The outer boundary of an artifact or a material layer constituting or resembling such a boundary.
Synonyms
bed board artifact level Mobius strip side mitre vertical surface artefact screen tread spandrel superficies ground skin plaster gameboard spandril plasterwork horizontal surface Klein bottle face projection screen silver screen miter work surface meniscus
Antonyms
natural object small large smallness unsized

4. surface

noun. (ˈsɝːfəs) The extended two-dimensional outer boundary of a three-dimensional object.
Synonyms
interior substrate interface firmament palate outside vault of heaven side wavefront hard palate celestial sphere bounds welkin empyrean photosphere boundary sphere roof of the mouth exterior bound heavens end face wave front inside substratum
Antonyms
inside outside start middle refrain

5. surface

noun. (ˈsɝːfəs) The outermost level of the land or sea.
Synonyms
body of water Earth's surface geosphere gap layer water lithosphere floor opening
Antonyms
imperfection soften nonmetallic kern take

6. surface

noun. (ˈsɝːfəs) A superficial aspect as opposed to the real nature of something.
Synonyms
facet aspect
Antonyms
victory defeat continue

7. surface

adjective. (ˈsɝːfəs) On the surface.
Synonyms
opencut opencast grade-constructed aboveground
Antonyms
subsurface overhead fatty undergarment undress

8. surface

verb. (ˈsɝːfəs) Come to the surface.
Synonyms
rise ascend bubble up emerge rise up go up intumesce come up resurface swell well
Antonyms
descend unfasten unstratified leafless good

9. surface

noun. (ˈsɝːfəs) Information that has become public.
Synonyms
open public knowledge general knowledge
Antonyms
sour stay begin beginning

10. upper

adjective. (ˈʌpɝ) Higher in place or position.
Synonyms
high
Antonyms
low black
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