tense vs fretful

tense is a noun but fretful is not a noun.

Word	Noun	Adjective	Verb	Adverb
tense	Yes	Yes	Yes	No
fretful	No	Yes	No	No

tense (noun)	fretful (noun)
a grammatical category of verbs used to express distinctions of time

tense (adjective)	fretful (adjective)
taut or rigid; stretched tight	habitually complaining
pronounced with relatively tense tongue muscles (e.g., the vowel sound in `beat')	nervous and unable to relax
in or of a state of physical or nervous tension

tense (verb)	fretful (verb)
cause to be tense and uneasy or nervous or anxious
become tense, nervous, or uneasy
increase the tension on
become stretched or tense or taut