Open English Wordnet
Nouns
(n)attentiveness, heed, regard, paying attentionpaying particular notice (as to children or helpless people)“his attentiveness to her wishes”, “he spends without heed to the consequences”
Adjectives
(a)heedful, attentive, thoughtful, paying attentiontaking heed; giving close and thoughtful attention“heedful of the warnings”, “so heedful a writer”, “heedful of what they were doing”