| SERIOUS | • serious adj. Without humor or expression of happiness; grave in manner or disposition. • serious adj. Important; weighty; not insignificant.
 • serious adj. Really intending what is said (or planned, etc); in earnest; not jocular or deceiving.
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| SERIOUSLY | • seriously adv. (Manner) In a serious or literal manner. • seriously adv. Gravely; deeply; very much.
 • seriously adv. Used to attempt to introduce a serious point in a less serious conversation.
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| UNSERIOUS | • unserious adj. Not serious; characterized by a lack of seriousness (Of attitude, approach, style etc.). • UNSERIOUS adj. not serious.
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| NONSERIOUS | • nonserious adj. Not serious. • NONSERIOUS adj. not serious.
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| SERIOCOMIC | • seriocomic adj. Having both serious and comedic qualities or tendencies. • SERIOCOMIC adj. partly serious and partly comic, also SERIOCOMICAL.
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| JOCOSERIOUS | • jocoserious adj. Simultaneously jocular and serious; mixing mirth with serious matters. • joco-serious adj. Alternative form of jocoserious.
 • JOCOSERIOUS adj. combining serious and humorous matters.
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| OVERSERIOUS | • overserious adj. Excessively serious. • OVERSERIOUS adj. excessively serious.
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| SERIOUSNESS | • seriousness n. The state or quality of being serious. • SERIOUSNESS n. the state of being serious.
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| UNSERIOUSLY | • unseriously adv. In an unserious way; flippantly, frivolously. | 
| SERIOCOMICAL | • seriocomical adj. Seriocomic. • SERIOCOMICAL adj. partly serious and partly comic, also SERIOCOMIC.
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| ULTRASERIOUS | • ultraserious adj. Extremely serious. • ULTRASERIOUS adj. extremely serious.
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| HALFSERIOUSLY | • HALFSERIOUSLY adv. in a partially joking way. | 
| OVERSERIOUSLY | • overseriously adv. In an excessively serious way. • OVERSERIOUS adv. excessively serious.
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| SERIOUSNESSES | • seriousnesses n. Plural of seriousness. • SERIOUSNESS n. the state of being serious.
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| UNSERIOUSNESS | • unseriousness n. The state or quality of being unserious. • UNSERIOUSNESS n. the state of being unserious.
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| SERIOCOMICALLY | • seriocomically adv. In a seriocomic manner. • SERIOCOMICAL adv. partly serious and partly comic, also SERIOCOMIC.
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| UNSERIOUSNESSES | • UNSERIOUSNESS n. the state of being unserious. |