Synonyms of the word

spiracle

• n. A pore or opening used (especially by spiders and some fish) for breathing.
• n. The blowhole of a whale, dolphin or other similar species.
• n. Any small aperture or vent for air or other fluid.

opening

• v. present participle of open.
• n. An act or instance of making or becoming open.
• n. Something that is open.
• n. An act or instance of beginning.
• n. Something that is a beginning.
• n. A vacant position, especially in an array.
• n. An opportunity, as in a competitive activity.
• adj. (cricket) describing the first period of play, usually up to the fall of the first wicket; describing…

orifice

• n. A mouth or aperture, such as of a tube, pipe, etc.; an opening.

porta

• n. (anatomy) The part of the liver or other organ where its vessels and nerves enter; the hilum.
• n. (anatomy) The foramen of Monro.